Quality control method of multicolour printing with primary colours

FIELD: printing.

SUBSTANCE: method of quality control of multicolour printing with primary colours is proposed. The method comprises: setting the range of values of colours on the printed material, at that the second primary colours are obtained by combining the primary colours with each other, and printing with successive superposition of the primary colours with the second primary colours according to the predetermined percentage to create the level of neutral-gray colour due to combination of the primary colours and second primary colours. In order to change the colour values for control of the colour change, the halftone of black "K" used as a reference level of the monochrome gray is compared with the level of the neutral gray colour in a predetermined range of colour values. Due to the use of the theory of balance of the neutral gray WING "K" Tone (WKTone) and visual technology the operators receive precise control of comparison of the colour ink consumption and precise control of change of the colour value, which can be read by the colour reading device for colour correction in real time.

EFFECT: technology can be used to improve the quality of obtaining the proofs of three primary colours and mass printing.

13 cl, 21 dwg

 

[0001] the Invention relates to a method of quality control of printing and more particularly to a method of quality control of multi-color printing.

[0002] the Basic theory of colors defined, and it can be found in the textbooks for secondary schools. The color wheel is a common tool for explaining theory of colors. Essentially, a full range of colors consists of six regular colors: Magenta (M), red (R), yellow (Y), green (G), cyan (C) and blue (B). Magenta, yellow and cyan are the primary colors in the subtractive color theory, which is used to manufacture, for example, inks and paints. Red, green and blue are the secondary colors of the additive according to the rules of transmission, which are used in electronics and light technology, such as television projection and optical scanning.

[0003] a Group of primary colors, including Magenta, yellow, and blue, share-based subtractive method and a filter glass, to which is added black as an image intensifier. This is the basis of the printing industry.

[0004] Traditionally, manual filtering technology colors used to segment color images using a coloured optical lens filter on channels CMY print. This methodology has created significant difficulties for experienced workers. For many ten�eti printing industry used ink for color printing CMYK (where "K" stands for black color), to simulate full-color reproduction using a small color space.

[0005] Computer technology are constantly improving the application of color channels for CMYK printing. In the printing industry uses a fast electronic calculating data, tools to save space and optical digital reproduction of colors. Manual color separation is no longer necessary. A multi-band color separation by means of data processing and electronic filtering is enough, if you have selected the correct values in the color channels as the input data for the calculations. Can also use other color channels, not CMY, and digital color inkjet printers can handle up to 12 color channels to give a color scheme, which is indistinguishable from the real colors perceived by the human eye. For printing you can use many colors, if the color of the ink channels provide digital color separation. Recently became available high quality colour printing. High quality printing can overcome the difficulties associated with obtaining true colors using CMYK printing, resulting in a narrow color range. The researchers found that the addition of more pure secondary colors of ink for printing, e�th red, green and blue, or groups of more than pure tertiary colors, i.e. cyan + red, yellow + green, Magenta + blue, etc., or any of two, three or more colors between each color group gives color images, which are more accurate than those created by the primary colors CMY. Get a wider color range gives a better fit to the original color spectrum perceived by the human eye. High quality colour printing is the ultimate goal of technology multi-color reproduction, designed to meet modern expectations for fidelity of color reproduction.

[0006] In the inkjet printing methods a true secondary colors of RGB are obtained by combining two primary colors, i.e. red = yellow + Magenta (R=Y+M), green = cyan + yellow (G=C+Y) and blue = Magenta + cyan (=M+). In the control system balance neutral-grey WKTone" pre-defined halftone value of the primary colors mix to form shades of neutral gray, and then compared to the pre-defined monochrome shade of black as a reference to aid in the correction of the color balance. Traditional secondary and tertiary color model by applying data on natural colours to get the exact�e pigments specific secondary colors and pigments specific tertiary colors. This improves some of the traditional printing imperfections due to the modeling of color spaces, giving a more accurate color balance. This method can be used in the production of multi-color printing.

[0007] simulated the Formation of secondary, tertiary and other groups of color: CMY is the primary color group, used in print production-color images. When any two of these three primary colors are combined, they form a secondary color of RGB. Other combinations of primary color with a secondary color will form a tertiary color. By further combining color groups, you can simulate a full color image. Since secondary, tertiary, Quaternary colors, etc. consist of a primary source CMY colors for artificial pigments or dyes, the results of color mixing is limited by the accuracy with which these colors can be reproduced. Therefore, the printing industry suffers from inaccurate colour reproduction for decades.

[0008] What is "high quality" print? High-quality printing is a printing technique in which additional ink colors used to expand coverage of the color gamut, creating optimal color images and achieving optimal play whe� models natural color scheme. Combinations most commonly used in this area are a six-color combination to color printing, six color ink (CMYK + orange + green) or seven color combinations for color printing with seven colored inks (CMYK+RGB).

[0009] Why industry requires high-quality color printing? Traditional production process of color printing CMYK suffers from insufficiency of colors due to limitations in the availability of mixed colors when the primary colors CMY, which form a narrow color gamut. High quality colour printing can overcome the obstacles to obtaining true colors, as it can enrich the color space and better simulate the original color scheme.

[0010] Although the technology of multicolor printing, the industry does not have sufficient means for color management to easily identify and control the balance of use of ink during high-speed printing processes. Vehicle operators are difficult to visualize all the color channels to control the unbalanced conditions of the ink supply and to respond quickly and accurately. Traditional e-reading devices for CMYK can not effectively interpret the importance of the secondary and subsequent (not primary) colors for accurate measurements.

[0011 Since the printing industry has an accurate and effective method of control of multi-color printing, the present invention provides a method of quality control of multi-color printing.

[0012] according To theory of balance of neutral gray balance neutral-grey is the result of printing with successive applications of a predetermined percentage (%) of each component of a color group, for example, three primary colors: cyan, Magenta and yellow; or secondary colors: red, green and blue with its opposite primary color; or tertiary colors: cyan and green, cyan and blue, Magenta and blue, Magenta and red, yellow, and red, yellow and green, each of which comprises two opposite primary colors.

[0013] When any color changes its value, hue neutral gray will also change its value and accordingly to shift the shade of gray to the side or too high proportion of color, if it is in excess, or in the direction opposite color, if he is in fault.

[0014] theory of colour balance Munsell describes the gray balance using the principle of the natural color spectrum, in which each of the colors RGB (red, green, and blue) has a precise and clear color value. Each secondary color contains two elements are the primary colors. By adding respective opposite primary colors of each color of RGB can be neutralized to neutral shade�about gray, to form a neutral gray tone WKTone (HCT). HCT is produced by combinations of red + cyan, green + Magenta, and blue + yellow. If any of the constituent colors of the nst (CMYRGB) changes its value, a neutral grey tone will accordingly move the shade to the side or too high proportion of color, if it is in excess, or in the direction opposite color, if he is in fault. Therefore, if circuit WKTone each visual target HCT is filled with points of interest semitones CMYRGB as the purpose of quality control of balance is neutral gray in the relevant field. Pre-defined patches per cent semitones "To" (MST) is placed as a reference guide, and MCT and HCT used for visual matching engine with benchmark goals. These goals guide the adjustment of ink to achieve precise multi-color terms balance neutral grey. This method is used in seven colour printing.

[0015] the Control balance neutral-grey at six-color printing can be achieved by applying the same principle as that for the seven-coloured fashion. For example, the orange color is composed of two parts yellow and one part Magenta (2Y+1M) to form a tertiary color. To create a balanced tone neutral grey for this condition using theory of color balance Mansell� neutralization is accomplished by adding corresponding opposite color (or colors), for example one part of Magenta and two parts of CYANOGEN (1M+2S) to orange. The result of this neutralization is (2Y+1M)+(1M+2S)=(2Y+2M+2S)=2(Y+M+C). Simplifying this result gives nst (C+M+Y), equivalent to the working principle WKTone balance neutral-grey-for print quality control. The formation of other colors nst follows the same principle.

[0016] the Invention provides a method of quality control of multicolor printing, comprising: (a) placement of the color patches on the canvas for printing; (b) combining the primary colors C, M and Y to form secondary colors and printing with successive applications of secondary colors and opposite primary colors in a predetermined halftone percentage to obtain a neutral gray tone; (C) comparison of the neutral-gray color with a black "K" by a semitone as the standard monochrome gray color patches, and (d) change of color patches to control color changes.

[0017] the Secondary colors are red (R), green (G), blue (B). The opposite primary colors are defined as follows: opposite color of the secondary color R it With the opposite color secondary color G - M, opposite secondary color In color - Y. the Corresponding percentage halftone secondary color is added to the opposite primary color to obtain nst.

[0018] the Tertiary color formed �UTEM combining a predetermined percentage of primary and secondary colors, for example, cyan, and green (C+G), cyan and blue (C+b), Magenta and blue (M+C), Magenta and red (M+R), yellow and red (Y+R), yellow and green (Y and G). Interest semitones tertiary colors add to the opposite primary color to obtain the HCT. For example, the opposite primary colors of cyan and green are yellow and Magenta, opposite primary colors of cyan and blue are Magenta and yellow, the opposite of the primary colors Magenta and blue are cyan and yellow, the opposite of the primary colors Magenta and red are yellow and cyan, the opposite of the primary colors yellow and red are Magenta and cyan, and opposite the primary colors yellow and green are cyan and Magenta.

[0019] the Quaternary, quinary and other color groups are formed from primary colors. Interest semitones Quaternary or quinary colors add to the opposite primary color (or colors) to get a nst.

[0020] the Amount of secondary color halftone of black "K" (MST) and print set by applying the opposite color way to obtain dual patches of grey MCT and HCT, which accurately print with overlay and placed together so as to close the print surface, creating teleoperator consistent visual standard for the analysis of gray, to determine the degree of harmonization and accordingly change the values of the color changes.

[0021] the Gray patches (MST) and HCT are intended for use as part of the printed images and are integrated into the print job by putting in the relevant provisions of this by providing a tool for visual assessment of color accuracy by visual inspection or automated analysis.

[0022] a Sample of neutral-grey calculated according to nst and the halftone of black "K" (MCT) for the purpose of fitting on stage to print, creating for the print job visual and machine-readable standard colors.

[0023] the Automatic scanner is used to obtain values of a patch of gray, using optical technology, and electric spectroscopy used in the operation of the closed loop to continuously read and automatically analyzed using a computer software shift values of colors and automatically adjust the unbalanced color values, giving the operator a visual goal to confirm the acceptability or otherwise of the result of automatic correction.

[0024] the Electronic components and optical technology used to produce the reference patch is neutral gray and the integration of this standard into the secondary light source �Veta RGB monitor, in order to calibrate the color by creating conditions neutral grey, creating a visual reference and values for use in the comparison performed by the reader device.

[0025] According to the requirements and job appropriate color template perform on a specific form, using grayscale patches to form sample standard; template color patches exactly type in the register, placing next to each other across the width of the printed surface.

[0026] Automatic color scanning device is used to re-obtain color values for calculations in the analysis of the correction of colors to determine the values of the color shift, creating for the operator a visual reading aid to help him in analyzing the results of automatic color correction.

[0027] According to the patches nst, MST and halftone patches made according to the required colors and patterns, one color progressive proof is done as a reference to print in the shape of a selected portion of a color print or proof with full-color overlay, depending on the requirements of the technological process, creating working standard for use by visual comparison.

[0028] the Principle of the gray balance is determined by optical theory as preset�th cent color values in which equal parts of primary colors superimposed on each other to form a black color, and at 50% of the state is formed by a shade of gray. Since different ink manufacturers are not able to provide the same hue of primary colors, shades of colors you cannot unify. Therefore, the selection of sets of printing inks from different ink manufacturers require a determination of the percentage of the primary colors required for the formation of the NSB. This method gives the black patches MCT to aid in visual comparison.

[0029] Specific reference color patches and choose replace selected primary and secondary colors to get 100% solid single color and a predetermined specific halftone of the same color, giving the operator information on the value of increasing the size of the raster points.

[0030] WKTone (Hi-Fi) includes different signs. The number of colors selected for printing allows you to get HCT using combinations other than the three primary color to contrast with black MCTS. This system of visual reference can be used for many printing operations. Print results can be quickly evaluated, and correction in real time can be effectively implemented to reduce the number of quality control steps in the cycle of printing.

[0031] Each time the automatic reading devices� finishes to collect information on changes of colors and data for correcting colors, WKTone (Hi-Fi) provides a visual goal to assist the operator in checking whether the correction stages, creating a "silent" and "effective" system between the operator and machine. If the reader mistakenly collect incorrect data for correction, causing the color shift HCT or MCTS in WKTone (Hi-Fi), this system will positively translates both grey tones in inconsistent state. The operator can (in real time) to visually determine the situation of the imbalance of grey without the need for a magnifying glass or the reader. Therefore, can be accurately set defective results.

[0032] the multi-color method WKTone (Hi-Fi) can provide a separate color, partial color and all required for the production of color images by calculating a color group NBT. The opposite primary, secondary, tertiary, etc. colors can be used to obtain a neutral gray tone, which can help in the process of visual assessment of the quality through comparison with MCT "To" for the purposes of color correction.

[0033] Since the secondary colors of RGB are used in color monitors can be added suitable electronic or optical filters to obtain a neutral gray tint, which can be compared with the reference gray patch.

[0034] advantages of the invention are summarized below.

[0035] 1. Lin�inye graphics device, contains information on middle gray tone to visually assess the consistency of the print. This can simplify the validation period of differentiation of colors and speed up the correction process colors.

[0036] 2. Continuous monitoring of the operation status of the printing press to the imperfections, split, stamp gears, mechanical wear, teenie, the unevenness of the ink supply, malfunction of automatic device scan color control strip and other problems associated with printing.

[0037] 3. Colored patterns are positioned next to each other, creating a control function. For harmonizing tones visual memory is not required, which helps in the process instant color correction. The operator can quickly and accurately compare and adjust the matching in real time.

[0038] 4. Methods of quality control can be broadly applied between stages of proofing and mass production.

[0039] 5. Methods of quality control can be widely used in many printing processes. This is particularly advantageous as applied to lithographic printing, digital printing, digital fabrication and traditional print and electromagnetic digital printing. This method can help with mechanical or digital electrostatic printing, digital electromagnetic�th printing and calibration of monitors (e.g., LCD).

[0040] 6. Specific job assignments may require different HCT values of gray balance as the target standards. This method overcomes the limitations of the control strip of gray in the default gray balance, if all the work is done in the conditions of approval.

[0041] 7. Specific job assignments may require pre-defined color values as the target benchmark. This method can be applied if all the work is done in the conditions of approval.

[0042] 8. Unique, pre-defined model templates neutral gray can be integrated into the content of a statement of work for the press.

[0043] 9. Method of visual assessment is facilitated by introducing a system of quality control balance neutral-grey for many flowers, which can effectively select a neutral gray tone to address issues with the ink supply imbalance.

[0044] 10. This simple method gives the operator an instant overview of the balance of the ink, this facilitating the adjustment of their submission and avoiding information overload and visual blending.

[0045] 11. This method of printing quality control can create a uniform environment of the color patches 100% working quests to OEMs for reading color density can obtain the changes in the values of shades of shades of gray p�means of photoelectron readers. This system can be used in the automatic scanning devices and adjustments that will quickly and accurately collect data and density values, so that the operator can quickly respond to make any required correction.

[0046] 12. By selecting a color halftone patches as a reference for printing instead of using 100% solid color patches for quality control, analysis overlay when printing with an imbalance of flowers can be simplified, and the reading time can be reduced.

[0047] 13. The element missing color can be easily determined without the use of expensive and sophisticated equipment for reading the density of the ink.

[0048] 14. This system is a versatile tool and can be used in different control systems and color management as a fast control device.

[0049] 15. Changes in shades HCT reveal the presence of imbalances in the values of the selected ink.

[0050] 16. Changes in shades of neutral grey tones are rapidly transmitted to the adjacent printed sheets and may indicate a mechanical malfunction of the printing machine or unstable conditions printed material.

[0051] 17. Adjustment ink supply is usually based on the CMY print results with successive applications. Traditional methods of IP�result only the standard density values of the individual colors, not achieved when printing with sequential overlay to reflect the actual status of the overlay printing. However, the imbalance between the ink supply can take place without such instructions.

[0052] 18. This system creates a visual target for the operator and serves to support the reader, which helps the operator to confirm, would it be acceptable if the result of automatic correction. This method is "silent" and "effective" way of the message.

[0053] 19. This method allows you to create models of the respective color forms in the form of halftone patches (based on the job requirements) as a reference to select colors for printing. These target color patches can be used in mass production.

[0054] 20. This method provides a means for visual inspection of the color correction. Suitable electronic or optical technologies can be used for correction of secondary RGB colors to create shades of gray to harmonize with the black neutral grey tone by comparison. This method facilitates the visual control of the steps for calibrating the color balance RGB.

[0055] 21. This system creates color patches as a reference for proofs using a color group. The standards can be prepared using different groups of monochrome progressive trial Otti�cov or with the use of a selected number of color proofs and trial proofs printed with full color overlay, depending on the requirements of the technological sequence of production. This method offers a working standard for the visual assessment of the uniformity and analyze colors using a reader device.

[0056] 22. This method of printing quality control can be implemented in the form of software that is available in the form of digital downloads and give the output in analog form, such as tonal wedges.

[0057] 23. The system can provide precise control of a single zone ink/ink keys during the manufacturing process of printing. Pre-defined patches of neutral grey are placed so that to maximize their coverage, to provide information on the values of the ink supply across the entire width of the printing and to avoid incomplete information on the values of the ink supply.

[0058] 24. There are no restrictions on the use of the ink sets. Any ink set can be used to obtain a neutral gray tone (tones), if the balancing conditions are controlled.

[0059] 25. The control system can be as minor to the extent to which it can be read. The height and width is not limited.

[0060] 26. There is no limit on resolving power in lines per inch.

[0061] 27. The system can use any type of installation of the raster halftone, for example, AM/FM.

[0062] 28. Raster angles �might be straight, and no specific raster angle for each color is required.

[0063] 29. This unique "pre-defined" system has no restrictions on the shape and size of neutral gray tone. Intermediate tone, and solids can be placed on a patch "To" grayscale, if the comparison can be read and measured with the use of equipment when appropriate.

[0064] 30. Control methods can give accurate, dense, given the printing environment using patches MST and nst in order to allow visual comparison. Both grey tones can be used to indicate the presence of a mismatch in the patches MCT and HCT for control purposes. A white line formed between MCT and HCT may indicate the interval between the patches MCT and HCT. The dark line between the patches MCT and HCT may indicate overlapping patches MCT and HCT. These signs give information about the confusion.

[0065] the Invention WKTone (HiFi) in connection with the primary color theory and balance-of-neutral-grey WKTone creates a system of control color balance is neutral gray in the method for Stripping when printing in electronic form or in the form of films, in which:

[0066] Fig.1 - Fig.10 - primary colors secondary colors plus with reference to the accompanying drawings:

[0067] Fig.1 is a plan view monochrome production version;

[0068] Fig.2 is a plan view �venoy production version;

[0069] Fig.3 is a plan view of the overlay model of cyan, Magenta, yellow, red, green, blue and black;

[0070] Fig.4 is a plan view of the model of cyan (C);

[0071] Fig.5 is a plan view of the model of Magenta (M);

[0072] Fig.6 is a plan view of the model of the yellow (Y);

[0073] Fig.7 is a plan view of the model of red (R);

[0074] Fig.8 is a plan view of the model of green (G);

[0075] Fig.9 is a plan view of the model blue (In);

[0076] Fig.10 is a plan view of the model of black (K);

[0077] Fig.11 - Fig.20 - primary color plus tertiary color with reference to the accompanying drawings:

[0078] Fig.11 is a plan view monochrome production version; [0079] Fig.12 is a plan view of a color production version;

[0080] Fig.13 is a plan view of the overlay model cyan, Magenta, yellow, yellow + red, cyan + green, Magenta + black;

[0081] Fig.14 is a plan view of the model of cyan (C);

[0082] Fig.15 is a plan view of the model of Magenta (M);

[0083] Fig.16 is a plan view of the model of the yellow (Y);

[0084] Fig.17 is a plan view of the model-yellow + red (R);

[0085] Fig.18 is a plan view of the model cyan + green (G);

[0086] Fig.19 is a plan view of the model Magenta + blue ();

[0087] Fig.20 is a plan view of the model of black (K);

[0088] Fig. 21 is a drawing of a theory of primary color and subsequent color:

[0089] Primary color: cyan, Magenta, yellow

[0090] Secondary color: red, green, blue

[0091] the Tertiary color: cyan + green, green + blue, Magenta + �tions, Magenta + red, yellow + red, yellow + green.

[0092] a Detailed description of the present invention given below in connection with the reporting of further details regarding the description of the invention. Being based on theory WKTone, the present invention provides halftone percentage points CMYKRGB in patches of suitable shape, placed sequentially inverted in relation to each other and tightly superposed on each other in the register, to create an environment of grey for visual assessment of uniformity and for the purposes of the standards for quality control. Standard "K" grey tone is the primary means of quality control and is used to form the "C, M, Y, CR, MG, YB" reference purpose neutral grey. This reference target has no limit on length; it can extend over the entire width of the working file without any errors in the information on colors, to facilitate the process of correction of color balance. Patches containing 100% CMYRGBK separate solid colors, and patches of predetermined tones in certain percentage can be used to replace areas in the patches "To" grey to give the operator additional information on the increase in the size of halftone dots.

[0093] WKTone (Hi-Fi) has a unique function of controlling the color balance is not overloaded with unnecessary data based on the requirements for identification of suitable �of abanov and shapes of patches and dynamically creates for the user a working environment for assessing the quality of color. This method applies multi-color elements by creating different combinations of locations that are densely provided and superimposed on each other to build a system of quality control color WKTone (Hi-Fi).

[0094] In Fig.1 shows a monochrome production version of the system of quality control multicolor print WKTone (Hi-Fi). In Fig.2 shows the result of accurate color printing CMYRGBK with successive applications. Fig.3 - mechanical engineering drawing. Fig.4 is a plan view of the color cyan, Fig.5 is a plan view of the color Magenta, Fig.6 is a plan view of the color yellow, Fig.7 is a plan view of the color red, Fig.8 is a plan view of the color green, Fig.9 is a plan view of the color blue, and Fig.10 is a plan view of the color black, which can be used to describe the technical drawings of individual colors. Each color is made to pre-defined templates semitones 41, 51, 61, 71, 81, 91 and 101 for use patch nst neutral gray when printed with successive applications, patches 100% solid color fill 42, 52, 62, 72, 82, 92 and 102, as well as pre-defined halftone patches of flowers 43, 53, 63, 73, 83, 93 103. These patches can be used for the continuous monitoring of the solid density of the individual colors and information about the increase in the size of halftone dots. To get the best color balance in the print result gray tone To a neutral grey tone should be located�mails in the conditions of approval, also the color tone, and should not be exposed to excessive colors blended colors "C," "M," "Y," "R," "G," "In" than supported the best balance of gray.

[0095] In Fig.11 shows a monochrome production version of the system of quality control multicolor print for tertiary colors WKTone (Hi-Fi). In Fig.12 shows the result of accurate color printing CMYYrCgMbK with successive applications. Fig.13 - mechanical engineering drawing. Fig.14 is a plan view of the color cyan, Fig.15 is a plan view of the color Magenta, Fig.16 is a plan view of the color yellow, Fig.17 is a plan view of the color yellow red, Fig.18 is a plan view of the color cyan + green, Fig.19 is a plan view of the color Magenta + blue, and Fig.20 is a plan view of the color black, so on each Resoure shows a technical drawing of a single color. Each color is made to pre-defined templates semitones 41, 51, 61, 171, 181, 191 and 101 for use patch nst neutral gray when printed with successive applications, patches 100% solid color fill 42, 52, 62, 172, 182, 192 and 102, as well as pre-defined halftone patches of flowers 43, 53, 63, 73, 83, 93 103. These patches can be used for the continuous monitoring of the solid density of the individual colors and information about the increase in the size of halftone dots. To get the best color balance in the print result gray tone To a neutral grey tone should�s to be in the conditions of approval, also the color tone, and should not be exposed to excessive colors blended colors "C," "M," "Y," " Yr," "Cg," "Mb", what supports the best balance of gray.

[0096] Specifically, Fig.3 - Fig.10 and Fig.14 - Fig.20 represent models printed image of each color, so each patch is adjacent to the next. In Fig.7, Fig.8 and Fig.9 shows a secondary color, and in Fig.17, Fig.18, Fig.19 shows a tertiary color. By combining pre-defined halftone primary colors with Fig.4, Fig.5, Fig.6, Fig.14, Fig.15, Fig.16 followed by the color bands formed by HCT. Versions of songs nst secondary colors are: Fig.4 + Fig.7 (cyan + red), Fig.5 + Fig.8 (Magenta + green) and Fig.6 + Fig.9 (yellow + blue). Versions of songs HCT tertiary colors are: Fig.14 + Fig.15 + Fig.17 (cyan + Magenta + yellow red), Fig.15 + Fig.16 + Fig.18 (Magenta + yellow + cyan green), and Fig.14 + Fig.16 + Fig.19 (cyan + yellow + Magenta blue). For each color patch monochrome grey tones black "To" (MST) in Fig.10 and Fig.20 is used as a standard single gray tone for its intended use nst primary and colour groups. In Fig.2 and Fig.12 shows the printing result with successive applications of the above groups of color that can be used for visual evaluation or assessment with the help of readers, which is in breach�t find data for comparison and help to control the color shift to correct it. Print results with successive applications give you a visual reference so that the operator can verify the accuracy of the color correction process using an automatic reader. In Fig.21 shows the color wheel theory for connections of primary and subsequent colors of the color groups.

1. Method of quality control of multi-color printing, including:
(a) the premises of the color patches on the canvas for printing;
(b) combining the primary colors cyan (C), Magenta (M) and yellow (Y) to form secondary colors and printing with successive applications of secondary colors and contrasting primary colors in a predetermined percentage of semitones to obtain a neutral gray tone;
(c) comparison of neutral gray tone with a halftone of black "K" as a monochrome gray reference color patches; and
(d) change of color patches for changes of colors.

2. A method according to claim 1, characterized in that the secondary colors are red (R), green (G), blue (B); the opposite color for the secondary color R is With the opposite color for the secondary color G is M, the opposite color to the secondary color is In Y; and a secondary color in the corresponding halftone percentage is added to the opposite primary color, to get her Central gray tone (nst).

3. A method according to claim 1, ex�featuring the what secondary colors are tertiary colors are formed by combining a given percentage of primary and secondary colors, and tertiary colors in the corresponding halftone percentage is added to the opposite primary color, to get HCT.

4. A method according to claim 1, characterized in that the secondary colors are Quaternary, quinary and other color groups formed from primary colors, and Quaternary or quinary colour in the corresponding halftone percentage is added to the opposite primary color, to get HCT.

5. A method according to claim 1, characterized in that the amount of secondary color halftone of black "K" (MST), and the print job is set by applying the opposite color way to get double the patches of grey MCT and HCT, which accurately impose and placed together so as to close the print surface, giving the operator a consistent visual standard for the analysis of gray scale to determine the degree of harmonization and accordingly to adjust the values of color changes.

6. A method according to claim 1, characterized in that both the grey patch and the patches of HCT performed as part of the print images and integrated working in a job through placement in the relevant provisions, creating a tool for visual assessment of the accuracy of the colors by the visual equipment are avai�CSOs inspection or automated analysis.

7. A method according to claim 1, characterized in that the sample is neutral gray made according to nst and the halftone of black "K" (MCT) for the purpose of agreeing on the stage to print, creating desktop print jobs visual and machine-readable color sampler.

8. A method according to claim 1, characterized in that use auto scanner to obtain the color values of the patch of gray, using optical technology, and electric spectroscopy used in the operation of the closed loop for continuous readout, and automatic computer software analyzes the shift of colors and automatically adjusts the unbalanced color values, creating for the operator a visual target to confirm, would it be acceptable if the result of automatic correction or not.

9. A method according to claim 1, characterized in that the element of electronic components and optical technology used to produce the reference patch is neutral gray, and integrate this standard into the secondary light source RGB color monitor to calibrate color by creating conditions neutral grey, creating a visual reference and values for use in comparison with the reader.

10. A method according to claim 1, characterized in that according to the requirements and job appropriate color Sablonniere in a concrete form, using the halftone patches to form the sample standard; template color patches exactly is printed in the register placed next to each other and the width of the printing surface.

11. A method according to claim 10, characterized in that the automatic color scanning device is used to repeatedly collect color values for calculations in the analysis of the correction of colors to determine the value of shift colors, creating a visual readout means to assist the operator in the analysis of the results of the automatic correction of colors.

12. A method according to claim 1 or 10, characterized in that the patches according to the nst, MST and halftone patches made according to the required colors and patterns, get one color progressive proof as a reference in the form of a selected portion of the color print or as a print with a full overlay of colors, depending on the requirements to the technological process, creating a benchmark for job assignment that will be used by visual comparison.

13. A method according to claim 1 or 10, characterized in that the specific color reference patches and choose replace selected primary and secondary colors to get some 100% black & white halftones and pre-defined halftone specific individual colors, creating for op�rathor information on the value of increasing the size of halftone dots.



 

Same patents:

FIELD: printing industry.

SUBSTANCE: proposed invention relates to a printing item comprising a substrate and a combination of printed inks including six colours. Each of colours is defined with a full tone and a half-tone of the specified colour, at the same time each ink has a value of colour difference dE of the combined full tone L-C-H-a-b, which is less than or equal to 2, and a value dE of the combined half-tone, which is less or equal to 3.

EFFECT: invention provides for production of printing items, which reproduce patterns with high accuracy.

7 cl, 1 dwg

FIELD: printing industry.

SUBSTANCE: proposed solution discloses the method to select components of a printing system for optimal colour rendition, which consists in design of an original, assessment of its colour characteristics, selection of optimal components of the printing system, verification of compliance between a printing impression and an original image and run printing. At the same time the printing system is previously tested, and colour triangles are built. Assessment of colour characteristics of the original is carried out on the basis of an electronic copy of the original. Modelling of colour characteristics of the original and characteristics of the printing system is carried out in a uniform colour space. Printing system components are selected by comparison of original and printing system characteristics modelled in the uniform colour space. When detecting groups of elements arranged outside a colour triangle of the printing system, a combination of printing system components is selected, at which the vast majority of elements will be absorbed with a colour triangle of the printing system.

EFFECT: reduced capital intensity of printing system components selection providing for colour rendition without distortion and with optimal colour rendition.

8 dwg

FIELD: ornamental art.

SUBSTANCE: method consists in the multiple overlaying on the plane-stabilised stencil padding in the same place and then overlaying the printing material with creating the multilayer image on the padding; the intermediate layer drying between their overlaying; the finishing of the upper image layer with the alkyd based material. As a stencil, the computer image copy received from the ink-jet colour high-resolution printer is used. As a padding, the fabric is used which is preliminary two-sided tinted using the water emulsion acrylic lacquer with filling agent as a priming; dried at the room temperature; cut by seizes 3 cm less than the length and 1 cm less than the width of the album paper of the ink-jet printer, laid over the paper format until the upper and right margins coincide; and stuck to the said format with a tape, on the paper's left side. As the printing material, the priming based on the water emulsion acrylic lacquer with filling agent and the printing material of the ink-jet colour printer and overlaid not less than twice one by one, are used. The padding is orientated in space by receiving the first copy on it, with the marks for overlapping all subsequent copies at album localised sheet, avoiding shifting the copies relatively each other. For finishing the upper layer, the several layers of zapon lacquer is used with the intermediate drying.

EFFECT: allows producing articles which imitate artists' paintings made by brush and oil.

1 dwg

FIELD: image printing technologies.

SUBSTANCE: required color is produced by mixing colors of image points, and on substrate fluorescent point of printing paints image are formed, which contain pigments fluorescent when excited by a certain electromagnetic emission, and also non-fluorescent image points of printing paints, containing colored pigments, non-fluorescent when excited by a certain electromagnetic emission. Aforementioned fluorescent image points and non-fluorescent image points are positioned on substrate in staggered order relatively to each other.

EFFECT: higher efficiency, higher quality.

2 cl, 4 ex

FIELD: image printing technologies.

SUBSTANCE: required color is produced by mixing colors of image points, and on substrate fluorescent point of printing paints image are formed, which contain pigments fluorescent when excited by a certain electromagnetic emission, and also non-fluorescent image points of printing paints, containing colored pigments, non-fluorescent when excited by a certain electromagnetic emission. Aforementioned fluorescent image points and non-fluorescent image points are positioned on substrate in staggered order relatively to each other.

EFFECT: higher efficiency, higher quality.

2 cl, 4 ex

FIELD: ornamental art.

SUBSTANCE: method consists in the multiple overlaying on the plane-stabilised stencil padding in the same place and then overlaying the printing material with creating the multilayer image on the padding; the intermediate layer drying between their overlaying; the finishing of the upper image layer with the alkyd based material. As a stencil, the computer image copy received from the ink-jet colour high-resolution printer is used. As a padding, the fabric is used which is preliminary two-sided tinted using the water emulsion acrylic lacquer with filling agent as a priming; dried at the room temperature; cut by seizes 3 cm less than the length and 1 cm less than the width of the album paper of the ink-jet printer, laid over the paper format until the upper and right margins coincide; and stuck to the said format with a tape, on the paper's left side. As the printing material, the priming based on the water emulsion acrylic lacquer with filling agent and the printing material of the ink-jet colour printer and overlaid not less than twice one by one, are used. The padding is orientated in space by receiving the first copy on it, with the marks for overlapping all subsequent copies at album localised sheet, avoiding shifting the copies relatively each other. For finishing the upper layer, the several layers of zapon lacquer is used with the intermediate drying.

EFFECT: allows producing articles which imitate artists' paintings made by brush and oil.

1 dwg

FIELD: printing industry.

SUBSTANCE: proposed solution discloses the method to select components of a printing system for optimal colour rendition, which consists in design of an original, assessment of its colour characteristics, selection of optimal components of the printing system, verification of compliance between a printing impression and an original image and run printing. At the same time the printing system is previously tested, and colour triangles are built. Assessment of colour characteristics of the original is carried out on the basis of an electronic copy of the original. Modelling of colour characteristics of the original and characteristics of the printing system is carried out in a uniform colour space. Printing system components are selected by comparison of original and printing system characteristics modelled in the uniform colour space. When detecting groups of elements arranged outside a colour triangle of the printing system, a combination of printing system components is selected, at which the vast majority of elements will be absorbed with a colour triangle of the printing system.

EFFECT: reduced capital intensity of printing system components selection providing for colour rendition without distortion and with optimal colour rendition.

8 dwg

FIELD: printing industry.

SUBSTANCE: proposed invention relates to a printing item comprising a substrate and a combination of printed inks including six colours. Each of colours is defined with a full tone and a half-tone of the specified colour, at the same time each ink has a value of colour difference dE of the combined full tone L-C-H-a-b, which is less than or equal to 2, and a value dE of the combined half-tone, which is less or equal to 3.

EFFECT: invention provides for production of printing items, which reproduce patterns with high accuracy.

7 cl, 1 dwg

FIELD: printing.

SUBSTANCE: method of quality control of multicolour printing with primary colours is proposed. The method comprises: setting the range of values of colours on the printed material, at that the second primary colours are obtained by combining the primary colours with each other, and printing with successive superposition of the primary colours with the second primary colours according to the predetermined percentage to create the level of neutral-gray colour due to combination of the primary colours and second primary colours. In order to change the colour values for control of the colour change, the halftone of black "K" used as a reference level of the monochrome gray is compared with the level of the neutral gray colour in a predetermined range of colour values. Due to the use of the theory of balance of the neutral gray WING "K" Tone (WKTone) and visual technology the operators receive precise control of comparison of the colour ink consumption and precise control of change of the colour value, which can be read by the colour reading device for colour correction in real time.

EFFECT: technology can be used to improve the quality of obtaining the proofs of three primary colours and mass printing.

13 cl, 21 dwg

FIELD: printing industry.

SUBSTANCE: first, on the holographic paper or on the micro-embossed surface the optically transparent images with a refractive index of more than 1.7 throughout the visible light spectrum are printed with the sol-gel ink containing titanium dioxide nanocrystalline sol in ethyl alcohol solution in water after drying the noted sol-gel ink. Second, topographic paper or micro-embossed surface with the optical transparent images with a refractive index of more than 1.7 printed with sol-gel ink is covered with optically transparent polymer or lacquer with a refractive index of less than 1.6 with creating of the optical masking effect of holographic paper or micro-embossed surface areas free of images printed with sol gel ink and selective display of rainbow holographic images printed with sol-gel ink.

EFFECT: creation of a technologically simple, fast inkjet printing with conventional inkjet printers of unique and individual colorful rainbow holographic images, which do not fade under sunlight and UV-radiation.

9 cl, 8 dwg, 1 tbl

FIELD: printing industry.

SUBSTANCE: printed product with rainbow holographic images is characterized by the fact that it contains a protective layer of xerogel of nanocrystalline titanium dioxide, optically transparent in the visible range of the spectrum, with a refractive index of not less than 1.8, located on rainbow holographic images.

EFFECT: simplification of the technology of manufacturing printed products with protected iridescent holographic images and production of non-fading sunlight and UV-radiation of specified printed products.

15 cl, 9 dwg

FIELD: printing industry.

SUBSTANCE: invention relates to printed products with a colour interference image printed on an inkjet printer by means of sedimentationally stable sol-gel ink in the form of a sol of crystalline titania nanoparticles of the anatase phase, allowing to obtain a colour interference image formed by at least one transparent in the visible spectral range by the refractive layer Xerogel of titanium dioxide with a thickness of 300 nm to 1 mcm, with a refractive index of more than 1.7 and a variable coloration as a function of and the thickness refractive layer prepared using a sol-gel ink in the form of a nanocrystalline titanium dioxide sol in solution of ethanol in water.

EFFECT: possibility of inkjet printing of printed products with colour interference images on non-porous surfaces.

5 cl, 3 dwg

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