Method of selecting colors of printing ink

FIELD: printing ink production systems.

SUBSTANCE: system has first computer which can exchange data with second computer. Second computer transmits data to first computer. Data contains info on required color of ink but it doesn't obligatory has info on other required properties of ink. First computer has data base for predicting color data of ink receptions when using selected set of basic colors of ink, program for selecting receipt of ink based on data for ink required, and program for transmitting info to second computer for representing color which relates to selected receipt of ink. Second monitor has color display where indo is represented. Set of basic colors of ink can be selected on the base of other required properties of ink, for example, low cost, light resistance or chemical resistance.

EFFECT: close match of colors obtained.

15 cl, 3 dwg

 

The technical field to which the invention relates.

In General, the invention relates to processes for the manufacture of printing inks. In particular, the invention relates to an interactive system to confirm color when communicating with remote offices and send printing inks in the farthest points for printing with permanent colors.

Prior art

Many companies are seeking to capitalize on the presence of national or international market, providing its customers the benefits delivery network points, when the product or service of equal quality available anywhere in the country or in the world. National or international company may also seek to maintain a reputation of good service and conduct serious research on the basis of joint and complementary efforts of groups separated geographically, but working together to meet customer requirements.

One of the approaches through which you can effectively describe a consistent presence on the international market, is to adopt the same view on the creation of labels and printed materials. While the company strives for uniformity, engaged in commercial activities in national or international scale, p is the place to begin is usually done at the local level of individual small independent printers. Therefore, labels, production of brochures or other printed items may have a color change from place to place printing or even in different runs due to error due to subjective ways of choosing colors, slight differences in the color patterns, different equipment, different printing conditions, etc. Besides, the colors of printed materials may vary due to the fact that they are printed using various processes, for example by using a lithographic process or gravure printing process. Depending on the specific type of printing device can also be used in printing inks of various kinds, such as paint, fixed by heating, or drying paint. Despite the great work of unification such differences in printed materials tarnish the reputation of a national or international company.

For these reasons, it is necessary to have a way of guaranteeing the closest colour matching and quality regardless of the geographic location of the printing material.

The invention

According to the present invention has developed a system that enables the buyer of printed materials ("the buyer printed publications") to receive printed materials that have a consistent color printing, even when the paint manufacturing is infused in different places, and the materials are printed by different printing companies and in remote places, and even when printing is performed using various printing processes.

The present invention also provides a computerized system with remote access capabilities to identify the desired color of paint and recipes for picking paint colors based on a defined set of available primary colors of paints. To determine the desired color to the desired color of paint is identified using spectral data or other data, provides the interface for the customer confirms the selected paint colors by comparison with a color standard, may not necessarily be the procedure to adjust the color of the paint (and recipes for paint colors) based on the data entered by the customer, and in order to make the paint, there may be a line of communication with a distributing plant, receiving basic paint colors related to the recipe, and intended for the manufacture of paint by mixing colored grounds in the recipe.

To make an additional batch of paint for the same or for a different printer that prints materials for a buyer publications, in the preferred embodiment, the generated recaptures is identified with the code of the buyer of a printed publication, or a product code.

In another aspect the present invention provides a method for identifying a desired color of paint in a computerized system with remote access capabilities, in which the desired color of paint is introduced into the color matching program, if necessary, the input data is first transform to the coordinate system used in the color matching program. In the color matching program uses the data in the desired color and, optionally, other data, such as information relating to the desired type of paint to determine the recipe for the paint-matched in color. Then the recipe can be transferred electronically to the production equipment, where the paint is made in accordance with the formulation of the paint. Preferably, the computerized system has identified the input color and created the formulation of ink from the buyer of the print edition so that you can prepare additional batch of paint.

Brief description of drawings

In the drawings:

figure 1 - functional diagram of one preferred variant implementation of the system according to the invention;

figure 2 - information screen, which transmitted the results of the electronic color matching in one embodiment of the invention;

figure 3 - screen graphics interp is is user in one embodiment of the invention.

Detailed description of the invention

When using a computerized system with remote access capabilities each operation of the color selection, choice of paint composition, coinciding with the selected color, confirm color selection and manufacture of paint can be removed, but still under control, to get a print of the same quality and color. The term "remote" means that the areas of the network are located in different network nodes. The process of confirming colors carry through the exchange of information between computers. The advantage of the invention, as is evident from the following description, is that the points to enter the desired color, to match the desired color with the paint recipe and for the manufacture of paints in accordance with this formulation may be in different parts of the world, and yet through the system of the invention process can be carried out from the initial input of the desired color to the manufacture of paint during the day or even a few hours.

In one aspect, the method and system according to the invention can be explained by reference to figure 1. In the embodiment shown in figure 1, at a remote location there are 2 spectrophotometer, the first computer (CPU) 4, color monitor 6, electronically connected to the computer, and osmotrophy stand 8. The spectral data of the color sample get the desired color using a spectrophotometer 2. Color data for the desired color is introduced into the computer 4, which transmits data to the second computer 10.

In the illustrated embodiment, the second computer is called the server or host computer, but all that is required is that the first and second computers can exchange information with each other. The invention is not limited to relationships, client/server, and you can easily see that there are other relationships that will enable the sharing of information between the first computer and the second computer. Thus, the invention is based on such a communication system, as a global communications network. One such global communication network is the Internet (based on transmission control Protocol/Internet Protocol or TCP/IP). Using this relationship, every customer-the printer can see the results of color matching. In a preferred embodiment, the system used a graphical user interface of the Internet (i.e. TCP/IP) for communication between individual customers-printers, buyers of printed publications, developers, packaging and other persons to whom such desirable selection of paint colors. In addition, it is preferable that the system was included as Vtorov the computer, the second computer Internet (TCP/IP) or the server, who interacts with the customer through the first computer of the customer or client interface. The customer (be it a printer, the developer or the purchaser of the printed edition) can enter the color and type of paint and/or to check the color identified by the system and displayed on the monitor 6 of the customer. These functions can be provided or additional server programs (through a common gateway interface), which takes the information entered by the customer, any additional applet client (e.g., Java), which is a program that is downloaded to the client and which is executed in the computer environment of the customer.

In one aspect of the invention, the server can process multiple requests. The server can transmit the information of the customer and information about the selected recipe paints manufacturing company selected by the server in accordance with the directives. Directives may include, for example and without limitation, instructions on proximity to the printing of the customer, whether a production plant in the stock material required for the formulation of paints or these materials to meet the needs of the customer will be later, and about the possibilities of manufacturing enterprises.

The second computer 10 (shown as server) selects the formulation of paints hyperedit color data, related to the selected recipe in the first computer 4, where the color pertaining to the formulation of the ink, can be viewed on a color monitor 6 and approved by the customer at a remote location. Color pertaining to the formulation of the paint, can be observed in a viewing booth 8 in different kinds of light, such as daylight D65, when the cold fluorescent light and tungsten lighting.

To select formulations of paint that matches the color you want in the server 10 used three software package 12, 20 and 22. Software package And 12 moves information in both directions between other system components. Spectrophotometer 14, color monitor 16 and a viewing stand 18 is used in two ways. First, they are used to create a database of colors associated with a set of primary colors of paints required for the manufacture of paints, or to modify or update the database to reflect changes or additions to the set of basic color inks. Secondly, they are used to control the effects of choosing paint colors, so that the manufacturer could see the same results that people can see at a remote location.

The software package 20 converts the spectral color data, which are input from the computer 4, or from software 22 of the database in the way the new information, which will create the same color on the screens 6 and 16.

Software package 22 includes a database of color information for a set of primary colors colors that will be used for the manufacture of paints. Software package With 22 database information is used for selection of paint composition, which will be created printing ink having a selected color, the most approaching to the desired (required) colour at any other given parameters. Other parameters that may be included in software 22 includes a selection of the least expensive formulation, providing a certain color difference, not exceeding a specified differencecolor correct color, the choice of formulation that will provide the specified chemical resistance, the choice of the formulation with the use of colored grounds bystronicasia paints, etc. essentially the selection of colors includes close as possible to copy the spectral characteristics of the color in the visible range of light with wavelengths from 400 to 700 nm, performed with those limitations in mind for the recipe. More color matching are described below.

When the selected color is approved by the customer at a remote location, the customer may send a confirmation of the computer 4 in the server 10 for projectors, the manufacture of paint. After that, the server 10 transmits the data of the recipe in the automated transfer installation 24. For the manufacture of paint in the automated transfer case 24 is the dosing and mixing of colored grounds of paint. Then the paint is packaged and sent to the printer.

At the first stage of the process the customer-printer enters information about the needs in the desired printing ink and other information which may relate to the order of printing ink. Although the customer may pass the information through other means, such as by telephone or facsimile, to enter it in the second computer or server, it is preferable for the customer to enter information using the graphical user interface and transmitted from the first computer (the client) to the second computer (the server). One example of an interface for entering information shown in figure 2. Information entered by the customer, includes the specific color and the identification of the printing device, and preferably, it also included the identification of the buyer publications, for which you will be printing. In addition, there may be additional information related to ordering paint, for example, the amount of required colors, method of shipment, the location of the customer and authorization for payment

Especially, it is preferable to include additional information related to the printed substrate, the printing facilities, and other information that may affect the selection of color on the substrate or on the choice of paint. Examples of such information include, without limitation, the type of substrate, substrate color, the printing process (for example, offset printing, gravure printing, sheet-feed paper, flexographic printing etc), the type of printing equipment, the performance of the printing machine and/or the type of paint or desired properties of the ink (for example, fixed under the action of ultraviolet (UV) radiation, chemical resistant, solvent-based or water-based, drying in air, fixed by heating, and so on).

In addition, you can enter information from two or more separate locations. For example, spectral color data can be obtained and put into one place, and other information can be entered from the second place, provided that the information from both locations is identified as belonging to one order file.

There are several ways to enter the desired color. In one embodiment, the desired color can be entered into the appropriate coordinates of the color space. The color coordinates can be obtained using spectrophotometry, e.g. the R when using a reflective spectrophotometer, and expressed in coordinates, for example in the color coordinates, such as X, Y, Z or L*, a*, b*, or in cylindrical coordinates r, θ, l or l*, C*, H*. The color coordinates can be entered directly from the spectrophotometer using the keyboard, using a mouse or trackball or otherwise. Although the characteristics of the color can be measured using other devices, such as a colorimeter, such means inherent in the more restrictive and more accurate color matching can be obtained using a spectrophotometer.

In the second embodiment, the color can be chosen from a library of colors displayed on the monitor of the computer of the customer. The customer can choose colors using an electronic input device. You can use any electronic input device in combination with the corresponding software, including, but without limiting them, keyboard, mouse, trackball, light pen, electronic graphics tablet, touch screen, a device for speech recognition, etc. Colors can be shown in the form of a matrix of colored fields or rectangles, in the form of continuous colors, such as color space, or other suitable means. For example, the color can be selected from colors that can be displayed by the monitor, the digital signal identifying the selected color is transmitted for color selection to the component system of the invention, which is the formulation of inks for the nearest color. In one preferred embodiment, the selected color occupies a large part of the useful area of the screen, so the customer can compare the selected color, color pattern, and to control the color selection.

In the third embodiment, the desired color is administered by scanning within a color pattern using a scanner with precise color reproduction by photography, color, digital camera, etc. of the Input color may be displayed on the terminal screen.

In yet another embodiment, the desired color can be precisely defined by reference to a color in the color picker or the color reference, for example in the color picker, published by the firm of Pantone, Inc. from Carlstadt, new Jersey in the form of Pan-tone® Color Formula Guide. You can get access to the database containing the color data defining each color, and then, as before, the color data for a given color can be used to identify formulations that provide the closest selected color in the case of this set of colored grounds of paint.

In a variant of the method the customer can enter the assignment code for the color that has already been picked up. Thus, once the buyer publications chose color, and picked up the wet with the assigned unique ID for the first time used in the process, then later the same color can be selected (the first printer or any subsequent printer) only by introducing a unique code without any additional stages of color selection.

When performing color matching server accesses the selection of colors to create recipes paint that provides a specific color. Using color matching the color information entered by the customer is compared with the color information in the database containing the data of the basic color inks for color bases paints, based on which it is prepared paint, and selects the appropriate proportions of colored grounds of paint to achieve the closest fit. Database prepared by measuring color information for printed samples, obtained using a set of colored grounds of paint and/or combinations of them at different concentration or saturation. The database contains a sufficient number of points of color information, so that if necessary the computer can extrapolate the color information, which may be the result of different combinations of the set of primary colors. In other words, the computer calculates the synthesized spectral characteristic or another color information for the formulation of paints on the basis of color information the La different concentrations of each primary color paint.

The color information used to prepare the database matching colors, can be obtained using the procedures of the trial printing, commonly used for paints, by using, for example, intelligent digital device to obtain control of imprints color information, it is preferable to measure a reflective spectrophotometer.

As a rule, color matching can be performed in various ways, some methods can provide more accurate results. First, the second computer can compare the spectral characteristics of the desired color in the visible range with the spectral characteristics of possible formulations of paints and choose a recipe or recipes paint that provides spectral characteristics most similar to the characteristics of the desired color. The comparison can be made using standard methods of selection curve, such as the construction method of least squares. In the second method of matching the color of the desired color can be expressed in the coordinates in the color space, for example in the coordinates of the CIE L*a*b*, L*C*H* or L*u*v* (CIE - international Commission on illumination). When choosing colors, use the color coordinates, to calculate the color difference between two points can be used the method of establishing tolerances colors. CIELAB (lab CIE) is one common method which allows to calculate the difference ΔE colors as

ΔE=Sqrt [(a1*-a2*)2+(b1*-b2*)2+(L1*-L2*)2]

In the method of the CMC establishing tolerances difference ΔE colors are calculated using the ellipsoid around the reference color axes, corresponding to the hue (SH), color saturation (SC), and lightness (SL):

ΔE=Sqrt [-L*/lSL]2+(Cab*/eSwith)2+(-Nab*/SH)2],

when this indicator Lordships l equal to 2, and the indicator color e equal to 1. An example of a program for comparing the desired color for the implementation of the optimal color matching is software for color matching with trademark COLORITE, from the company Datacolor, LAWRENCEVILLE, new Jersey. The color coordinates of the CIELAB (lab MCOs) can be calculated from the full spectrum of reflection, using the formulas published by the ice. In addition, there are devices which directly determine the coordinates of CIELAB, for example spectrodensitometer X-Rite 938, which can be obtained from the company X-Rite, Grandville, Miami.

Because the color may appear different when observed under different light sources, it is preferable to include in the database the color information as that is about, what will seem to color under different light sources, such as sunlight, when the fluorescent lamp D65, with cold white fluorescent light and incandescent light. Therefore, the color information with respect to the desired color of paint can be entered for each of the different light sources, and color matching can be done by determining the smallest value ΔE. considering paint colors for all the different light sources.

In addition, color matching can be done by comparing the values of the reflectance in the visible spectrum for the desired color and the color identified by the color matching program. To determine the formulation of a paint having a spectral characteristic, most approaching the spectral characteristics of the desired color standard, it is possible to perform calculations using the least squares method, while the spectral characteristics for the formulation of paints can be extrapolated from the information about the measured spectral characteristics that are in the database.

Color pertaining to the formulation, can be displayed on the monitor of the customer to confirm the customer. In this case, the customer may be a printer and/or the buyer publications, and/or developer package or other printed tools massivelyparallel. For example, the color pertaining to the formulation, can be displayed on half of the block, following the half block that displays the color entered by the customer, or in the color window displayed on the monitor together with other data. One example of such a screen is shown in figure 3. When you confirm the color the customer can compare the desired color and the desired color of paint to be displayed on the screen with all the different light sources. Alternatively, the second computer can transmit the image to match the desired color and the desired color of paint under different lighting conditions.

To such an image representing the calculation results of color matching for a set of colored grounds of paint, the display must be able to accurately reproduce colors. Know how to calibrate the colors on the monitor to accurately display the selected color on the monitor. Industrial system calibration can be obtained, for example, by X-Rite, Inc., Grandville, Miami, and from the company Datacolor, LAWRENCEVILLE, new Jersey. Typically, this calibration involves the use of a standard mosaic with known values of reflection.

In the same way the results of the color matching process can be transferred to the customer in various forms to confirm color. First, the color relating the I to the selected recipe paints, and the desired color can be displayed in one row on the monitor. Color monitor 6 must be properly calibrated to accurately display color corresponding to a selected recipe, paint, and color, subject selection. The colors displayed on a color monitor 6 can be observed under different lighting through the use of a viewing stand 8 with variable lighting. Alternatively, the second computer 10 can calculate what each color will look at selected different light, and to transmit the first computer results that allow you to display the desired color and color pertaining to the formulation of ink, for each selected lighting conditions.

The customer can confirm the shown color or require that the color was changed. For example, the customer may send a request back to the color matching program with the requirement that the color was made lighter, and then look at the results of this query. The results can be sent to the customer for review and confirmation within a few minutes instead of days required to obtain a new paint colors manually print control print and delivery control of the print to the customer.

To meet the requirements of printers or buyers of printed publications, it is possible in order to establish alternative criteria for selection of paint composition. For example, instead of possibly the closest color matching system can find the song with the lowest cost, which is very close to the color coordination with a given accuracy Δthat is, in Addition, the closest color matching can be carried out using a colored base having certain properties. For example, the set or subset of non-ferrous bases can be used to obtain paint with properties selected from a chemical resistant paint, siteprotect, fixing radiation, heat resistance, ability to foil stamping, fitness for a coating that is resistant to ultraviolet radiation, the possibility of laser imprinting and their combinations. Along with the desired color of the input information may include information about the need for such specific properties of the ink. If a particular property, such as chemical resistance, set definition of paint composition in the system according to the invention are only those colored dye base, which is the key to this property.

Formulation of paints, identified with the entered color, can be stored in the database together with information about the buyer publications, supplied by the customer identification of the customer and order details, the date of confirmation by the printer,the purchaser of the printed edition, or developer, or other information.

When the recipe was identified for the paint of the first type, for example, for offset inks, and the same color is desirable to paint the second type, such as inks for gravure printing, the color data for the inks of the first type represent the desired color, and the same process will be repeated to determine the formulation of the paint of the second type using the main colors of this type.

In the program you can enter additional information that defines a consistent formulation, guaranteeing the selection of color and characteristics of paints for specific custom printing work. For example, it is known that color paint may vary depending on the substrate you are printing. For example, the paint may appear to have a different color when printing on a colored substrate compared with color on a white substrate or when printing on different types of paper, coated or uncoated, depending on the desired layer thickness of the image or when printing on a plastic or metal substrate, compared with paper. If ever assume printing on the substrate, the calculation of the formulation, it is preferable to consider the color change. For example and without limitation, the types of parameters that can be taken into account when calculating the formula, include the type of substrate, substrate color (which is also you can enter in the form of spectral data or select any of the following ways, already discussed in relation to input the desired color of paint), the absorption of the substrate, the weight of the paper, when the substrate is a paper, information about whether a paper or cardboard substrate coating or no coating, etc.

Further identified the formulation of the ink is transferred to production equipment. Production equipment may include, for example, the automated transfer installation for the manufacture of paints dispenses the exact amount of each primary color in the composition of the paint. Automated transfer the unit can be electronically linked with the program that receives the data of the customer and determines the exact formulation of the paint. Transfer system can also be controlled by entering the information manually, for example via the keyboard. Then made the paint is sent to the customer.

The system may include additional components related to the production, such as software for labeling, software for inventory and financial software. Such components are known in the art and need no additional description.

When using the system of the invention, the time required for the selection of the customer colors are manufactured to the ASCI with accurate color and send paint to the customer, significantly reduced in comparison with the currently used process, when the customer sends a color Swatch of the paint manufacturer, which develops the formulation of the paint, the color of which corresponds to the sample, and finally, producing the composition, and sends the paint to the customer.

In one preferred embodiment, the system provides ink for offset lithographic equipment, including sheet-fed printing equipment and roll-fed printing equipment, although the invention can be applied to the colors used in other processes, such as processes, gravure, flexography and screen printing. Paint can be fixed by radiation (including fixed by ultraviolet radiation and fixed by the flow of electrons), drying in air, drying in the cold (absorbing dyes, such as newspaper-based paint), drying by heating paints, water-based or solvent-based.

For example and without limitation, a set of primary colors used for obtaining a lithographic inks may include a set of inks of different colors containing varnish or solvent that can be mixed to obtain a wide range of colors. The set of basic colors usually includes on m is Nisha least about twelve basic colors, but may include 40 or more primary colors. Although with the increasing number of primary colors increases the complexity of dosing and mixing installation, increased the number of primary colors also enhances the ability of the plant to a closer agreement with the flowers of the customer and to satisfy the customer in terms of specific properties of the paint, such as rapid fixing of paints, heat resistance paints and chemical resistance of paints.

In a preferred embodiment, the nail set of basic colors, it is preferable to select the conditions to achieve good performance printing on various printing machines.

In another embodiment, the viscosity and other properties selected by the color of the ink can be adjusted to adapt to the particular printing machine, for example by changing the amount of filler added to the paint, or by varying the ratio of different lacquer resins in the paint. Such adjustment can be made depending on the design and configuration of a printing machine, the view of the fountain solution or forms printed in lithographic printing processes, etc.

Using the method of the invention can be obtained printed numerous species, including information and trade brochures, false advertising, magazines, catalogs, Fi is the industry bulletins and annual reports of companies, packaging materials, including cardboard boxes, other containers, and labels etc.

The invention has been described with references to preferred embodiments of. However, it should be clear that within the essence and scope of the invention and the attached formula can be made of changes and modifications.

1. System for providing color matching print, containing the first computer, which can communicate with a second computer, said first computer contains

(a) a database of data for predicting the color data of formulations of paints using a set of primary colours

(b) a program that uses the data from the database, to calculate the paint formulations based on data for a given ink, and

(c) program to transfer the color information for the second computer to display the color printing pertaining to the formulation of paint on a color monitor connected to a second computer.

2. The system according to claim 1, additionally containing an automated transfer the installation to which the first computer transmits data recipes for the manufacture of paint specified by the formulation of paints.

3. System for creating recipes, which will be the selection of the desired color, containing the first computer, to the which can communicate with the second computer, while the first computer contains

(a) a database for predicting the color generated by the formulations prepared using the set of basic colors,

(b) a color matching program for use of the database, with the aim of calculating the formula, which will provide the predicted color matching with the color you want;

(c) program to transfer the color information for the second computer to display the predicted color on a color monitor connected to a second computer.

4. The system according to claim 3, in which the program (s) may send color information to the second computer for display on the monitor of the desired color along with the predicted color.

5. The system according to claim 4, in which the program (s) can transmit color information for the second computer to display how the predicted color and the desired color will look under different lighting conditions.

6. A method of manufacturing paint with color printing, coinciding with the desired color printing, comprising stages, the implementation of which

receive from the second computer by the first computer the color information for the target color printing access by the first computer to the database for predicting colors of a print to the formulation of paints,

what are square access by the first computer to the program selection of colors and using color information from the database for predicting color printing for formulations colors for choice of paint composition, providing a color print that matches the specified color printing, and

passed the recipe paints automated production equipment and manufacture paint in accordance with the formulation of the paint.

7. The method according to claim 6, wherein said first computer and said second computer connected via a network connection.

8. How to change the formulation of paints containing phases, the implementation of which

(a) introducing the first computer, information about the required change of the color information for the color print belonging to the first formulation of the paint,

(b) access by the first computer to the program selection of colors to create the second formulation of the paint, providing color printing with the desired color change,

(c) transmit to the second computer display data for display on the color monitor print belonging to the first formulation of the paint, and color printing belonging to the second formulation of the paint.

9. The method of preparation of the formulation of paints containing phases, the implementation of which

introducing the first computer data required for color printing and at least one parameter selected from the group comprising properties of the ink, the type of paint, cost, identification of the printing device, the printing process, the pair of the parameters of printing equipment, the performance of the printing machine, the type of substrate, substrate color, and combinations thereof,

access by the first computer to the color information for predicting colors of a print relating to the formulation of the paint, using a set of primary colors colors that are selected on the basis of at least one parameter,

use matching colors for choice of paint composition for the case of at least one parameter, receiving the desired match with the specified color.

10. The way to create two formulations of paints containing phases, the implementation of which

choose the first recipe paints a method according to claim 9 and

choose the second formulation of the paint method according to claim 9, in which the desired print color is the same for the first formulation of the paint and the second paint formulations, and, moreover, in which at least one parameter is different for the first formulation of the paint and the second paint formulations.

11. The method according to claim 10, in which the predicted color printing in case the first of paint composition is not more than the preset color difference from a predicted color printing in the case of the second formulation of the paint.

12. The method according to claim 10, in which by means of the first computer transmits to the second computer display data for display on the color monitor printing, otnosyawivosa is the first formulation of the paint, and color printing belonging to the second formulation of the paint.

13. The method according to item 12, through which the first computer is additionally passed to the second computer data display to display desired colors on the monitor.

14. The method according to claim 10, in which at least one parameter represents the type of paint.



 

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6 cl, 1 dwg

FIELD: technical physics.

SUBSTANCE: in accordance to invention, components of color vector and intensiveness of radiation, reflected from surface being measured and standard, are measured. Then, components of color vector of surface being measured for removing individual features of spectral composition of lighting source and its intensiveness are corrected with consideration of value of measured components of standard color and values of measured values of light emission intensiveness and composite color vector of surface being measured is formed, which acts as identifier of color properties of surface - color hue and brightness of surface being measured. Surface color meter contains scanning unit, unit for measuring color vector with four rows of photo-receivers, while three rows of photo-receivers are meant for measuring color component and have color filters for 3 main colors, while fourth row of photo-receivers has no light filters and is meant for measuring intensiveness of light reflected from surface being measured and from standard. Measuring device also has block for generation of composite vector in 3 main colors.

EFFECT: identification of collection of color properties of surface invariantly relatively to lighting.

2 cl, 2 dwg

FIELD: measuring technique.

SUBSTANCE: method comprises comparing the specimen with unknown reflection coefficient with a standard having known reflection coefficient by means of an auxiliary arrangement for the spectrophotometer. The measurements of the reflection coefficient that is less than 20% are performed with the use of a standard that is made of a plate with black back side made of an optical glass with known reflection coefficient. To measure a more than 20% reflection coefficient, a standard is made of a mirror with outer reflecting chromic layer.

EFFECT: enhanced precision.

3 dwg

FIELD: technology for measuring color, in particular, colorimetry of paintwork materials.

SUBSTANCE: in accordance to invention, sample field of color being measured is positioned on RGB screen of personal computer monitor near luminous field of comparison of alternating color of screen of RGB monitor and illuminated by moving source of with light by means of semi-transparent mirror, installed at an angle of 45° to horizontal observation axis of operator. Immediately below sample field second luminous area of monitor screen is positioned, used as alternating field of thinning color of sample. Field of sample and field for thinning its color are optically combined on operator axis by means of reflecting mirror, mounted in parallel to semi-transparent mirror. Colors of comparison field and sample color thinning field may be changed by software means (for example, using Adobe Photoshop software), by selecting certain ratio of luminescence brightness Br, BG, BB of monitor pixel elements. The essence of measurement is in finding such a digital value of colorimetric brightness Nr, NG, Nb of pixel elements while changing number of units of brightness, at which sample and comparison fields do not differ in color. For some colors, chrominance coordinates (x,y) are outside the color coverage zone of (R),(G),(B) triangle and it is only possible to even out fields of sample and comparison by decreasing purity of sample color field, i.e. by thinning its color with one of RGB radiations. Thinning process is performed by means of reflecting and semi-transparent mirrors. One of numbers Nr, NG, Nb in color equation for corresponding point on one of limits of (R),(G),(B) triangle is negative, indicating absence of one of RGB radiations in comparison field. Therefore, on basis of absent radiation of one of RGB colors in comparison field, necessity of enabling of one of RGB colors in thinning field is fixed.

EFFECT: simplified process of selection of prescribed composition of paint.

2 cl, 4 dwg

FIELD: the invention refers to modes of defining color formulas for receiving preliminary prescribed optical properties in hardened compound which is received by way of mixing one or more basic compositions, for example, basic paints or toners.

SUBSTANCE: the color formula is defined with the usage of parameters defined for each party of the basic composition characterizing polish, texture, metallic shine etc. The basic compositions are packed in containers holding the carrier of information such as a shade code granting definite parameters to each party.

EFFECT: excludes necessity in correction of color or in screening of the parties of basic compositions and remove influence of variations between the parties of basic compositions on quality of received paint.

9 cl, 2 dwg

FIELD: physics.

SUBSTANCE: methods of formula calculation of mat, polished, pure tints used to evaluate proportion of flatting agents in formula without necessity to perform actual calculation of composition formula based on common spectrophotometric characteristics of mat sample using standardised measurement geometry 45°/0° in combination with established gloss measurement, or, alternatively using spectrophotometer provided with geometry measurement d/8° and analysing indications taken with included and excluded reflecting component.

EFFECT: precise results without additional tinting stages.

10 cl, 8 dwg, 2 tbl

FIELD: physics, measurements.

SUBSTANCE: invention relates to measurement techniques. In compliance with the proposed invention, the object surface is illuminated by two full-colour (white) light sources, coloured photo- and video cameras are used to gather the data on brightness and colour tone corresponding to light beams reflected from preset exterior of the object illuminated surface. Then, the data gathered is processed. Illumination is effected by, at least, two light sources illuminating the object surface in turns and at different angles.

EFFECT: ruling out fluence of flare reflected from object surface on measurement results.

2 cl, 1 dwg

FIELD: technological processes.

SUBSTANCE: invention is related to the field of sensing of glossy surface colours, in particular, to colorimetry of paint and varnish materials, which include in their pigment composition small metal particles ("metallics"), specific feature of which is dependence of coloured surface colour on visual angles of observation or lighting. Aside screen of RGB display of personal computer, measured colour sample field is located and is illuminated from several, for instance, three 10, 40, 80, angles by white LED. On screen of RGB display, luminous square field is generated by means of sample colour dilution, which is equal to sample field, which is framed in screen of RGB display by square luminous field of alternating colour, generating field of alternating colour comparison, and it is optically transferred to axis of operator eye with the help of parallel system of reflecting and semi-transparent mirrors. By maximum brightness (Y10, 40, 80) of separate triads of additional white colour, colorist identifies size of metal particles of "metallic" paint, and their number on alternating colour field helps to define their concentration.

EFFECT: simplified selection of paint pigment composition.

3 dwg

FIELD: printing ink production systems.

SUBSTANCE: system has first computer which can exchange data with second computer. Second computer transmits data to first computer. Data contains info on required color of ink but it doesn't obligatory has info on other required properties of ink. First computer has data base for predicting color data of ink receptions when using selected set of basic colors of ink, program for selecting receipt of ink based on data for ink required, and program for transmitting info to second computer for representing color which relates to selected receipt of ink. Second monitor has color display where indo is represented. Set of basic colors of ink can be selected on the base of other required properties of ink, for example, low cost, light resistance or chemical resistance.

EFFECT: close match of colors obtained.

15 cl, 3 dwg

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