How to reasonable arrangement of color overprint order

 In color printing, how to reasonable arrangement of color overprint successively order is an important hot topic in the field of technology and technical personnel.Printing one of the most important role is to copy the original artistic, this requires printing workers have a certain artistic taste and the presence of the master color changes.Improper arrangement could lead to a print color series produce color, mixed color and inverse overprint fault;Color sequence arrangement of science, can make the print color is more close to the original, and even strengthen the atmosphere of a certain color, clear the hierarchy and points clear, overprint accurate, color real, natural and harmonious.
The cause of color order need to arrange three reasons: the effect of ink dieyin mutually and shortcomings of ink pigment, the quality of the paper, to identify the ability of the human eye to color.One of the most fundamental reason is not completely transparent printing ink itself, namely the covering power of the ink itself.Printing ink after the first printing ink layer covered the role to a certain extent, the colour of the print present always focus on performance after a kind of color, or focus on after a mixture of color with the color.To choose the starting point, the color series is according to the actual circumstances of the manuscript, in combination with the current process conditions, to take care of the main aspects (such as reproduction, color reproduction, by definition, printing uniformity and repetition rate, etc.), flexible color series.
1. As a result of the yellow ink transparency is good, for the final color for enough white light into the ink layer from top to bottom, bright-coloured and lively color.
2. Yellow ink has a faster drying performance, but also has a larger printing area.The yellow ink columns at the end of the day, not only can prevent yellow ink drying too fast caused by vitrification, still can use its large printing area, and soon the characteristics of the oxidation of conjunctiva, covered in other ink layer surface, make the print gloss.
3. The yellow line in the final color, easy to control the amount of yellow ink, can be adjusted at any time against the same.
4. The yellow ink is expensive, is arranged in the final color can save the amount of yellow ink, reduce the cost.
Color printing, is the combination of technology and art crafts.We in the arrangement of printing color sequence, properly in terms of art, can make the print more artistic appeal, meet the needs of the readers.
The first color offset printing monochrome machine and the second color printing has a time interval, during this time the links of oil foam material gradually permeate in the paper, ink surface oxidation conjunctival gradually.In the second color printing, the printing ink is printed ink layer in the conjunctiva, the so-called pressure dry wet.Multicolor machine during printing various version of the ink dieyin together in an instant by in less than a few seconds, the very short time intervals between various after color can't be printed in the oxidation of conjunctival ink layer on this is the so-called pressure wet wet.
Multi-color machine in the process of "wet wet pressure", the most easy to accept the first set of white paper printing ink.Black is the most obvious, followed by green, magenta, known as the three color, man's vision the yellow to reflect the most dull, so in the final.After the first color group ink should be thick some, decreasing the concentration of each color by machine, black on the first color printing overprint accurate.This is multicolor machine generally gives priority to color with black, green, magenta, yellow sequence.
Multicolor machine ink overprint is in the case of "wet on wet", on the relationship between ink viscosity and overprint, after color ink viscosity values cannot be too much greater than the former one color ink, otherwise it will just printed color ink stick, before by rubber roller to print on the child, not only cause ink "mixed color", but also cause ink printing, calendar inky is very weak, no spirit.Found this kind of circumstance can be taken to adjust four color printing ink viscosity relationship or change ink color sequence successively methods to remedy.
Arrangement of color sequence method should follow the outstanding images of the main color of principle in order to prevent the main color covered to decide color sequence.In general, with image area and the dominant color as color sequence arrangement.
Therefore, after accept products printed a kumite sample picture one color on surface analysis, the appropriate change to meet the original color series, with the manuscript of the full performance, to reappear its order harmonic colors better.
General like calendars take people as the dominant screen (warm tone) is given priority to with black, blue, red, yellow sequence.General picture of large area landscape dominated (cold) is given priority to with black, red, blue, yellow.Folded area 4 color of color should be more dominant color is given priority to consider color sequence, including a large black, also don't rule out the possibility of the printing color sequence.For some main two-tone color board in printing and proofing controlled gap bigger difficult circumstances can be used in a hierarchical way of printing, folding board twice or more sun exposure PS version of the method.In short to restore the color to give priority to.Daring, more scientific.To fully understand plate proofing is pressing circle, and print is a circle pressure circle.The fact that dot enlargement printing a value greater than proofing.