A method of obtaining a four-color reproductions of screen printing
(57) Abstract:A method of obtaining a four-color reproductions of screen printing, which consists in applying on the front side of the transparent material of two different colours of paint layers, bearing direct bitmap, and on the reverse side, the other two layers of paint in various colors, carrying the mirror raster image, wherein the raster pattern images on the front side to move one relative to another on pollperiod raster horizontally and raster pattern images on the reverse side move one relative to another in the same direction on pollperiod raster horizontally, moreover raster pattern images on the front side of the transparent material are shifted relative to the raster structures of the images on the reverse side on pollperiod raster vertically.
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.
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.
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
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