Offset printing spot color ink color matching method considering cost factor

Abstract

The invention discloses an offset printing spot color ink color matching method considering the cost factor. The method comprises the following steps of (1) storage into a database: price parameters Pi (i is from 1, 2 to M) of base color ink are stored, and the M shows the price number of the base color ink participating in the color matching; (2) base building: the base building aims at obtaining fai, i.e. the value matrix of the ink unit concentration is obtained; (3) ink color matching precision and color matching cost considering: the solved target optimization function ci is the concentration of each kind of ink are is a parameter to be optimized; and (4) solving: the formula can be solved by a simplex search method, when the minimum value of the formula is solved, the ci value can be solved, and the cost of the ink participating in the color matching can be known through ci. The offset printing spot color ink color matching method has the advantages that the offset printing spot color ink color matching precision can be more precise, the color matching efficiency is greatly improved, meanwhile, the use cost of the offset printing spot color ink can be effectively reduced, and the industrial application prospect is realized.

Description

technical field [0001] The invention relates to a method for matching offset printing spot color inks, in particular to a method for matching offset printing spot color inks in consideration of cost. Background technique [0002] With the continuous development of printing technology, the requirements for the quality of printed matter are also continuously improved, and for color halftone printing, the color rendering effect of printed matter is one of the most important factors for evaluating the quality of printed matter. Therefore, it is very important and extremely complicated work to accurately grasp the color rendering mechanism of printed matters. [0003] The use of spot color inks can reduce the number of printing plates, the number of printings, and effectively use the remaining ink, so spot color inks are widely used in printing companies. In a market with many branded products, spot colors can reflect the brand effect of the product and have an advertising role ...

AI Technical Summary

Problems solved by technology

In the prior art, a combination of the principle of minimum mean square error, spectral color matching and tri-stimulus value color matching proposed the "excited spectral color matching method" to study the spot color matching of offset printing inks. Compared with other color matching methods, this method fully embodies the The color pattern of the ink reduces the degree of metamerism and improves the accuracy of color matching. However, this method does not consider the cost of color matching inks and cannot effectively reduce the ink cost of the enterprise. Especially when fluorescent inks are matched with ordinary inks, color matching inks should be considered. Cost is particularly important, so further research is needed

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