Method and device for controlling stability of printing color

Abstract

The invention discloses a method and a device for controlling the stability of a printing color, wherein the method comprises the following steps: control color lumps added on a printing material are measured when the printing at each time is carried out to obtain the measuring value of each color lattice point of the printing material; a printing output curve is obtained according to the input value and the measuring value of each color lattice point and is compared with a first target curve to obtain the input congruent relationship of the printing output curve and the first target curve; and a compensation curve is obtained according to the input congruent relationship, and the printing input curve is compensated according to the compensation curve when the printing at next time is carried out.

Description

technical field [0001] The invention relates to the field of printing, in particular to a method and device for controlling printing color stability. Background technique [0002] In the printing industry, the key point of production control is color control, and the key point of color control is to maintain the stability of output color. In the printing process, with the passage of time, equipment (printing machines, plate-making machines, etc.) aging, environment (temperature, humidity, etc.) changes, consumables (paper, ink, blanket, plate, etc.) quality instability, process control parameters (such as the temperature of the fountain solution, pH value, conductivity, isopropanol concentration, etc.) fluctuations, etc., will have an impact on the stability of the printed output color. [0003] The methods commonly used by printing to control printing stability are: (1) use the same brand and model of paper, ink, blanket, fountain solution and other consumables; (2) use ai...

AI Technical Summary

Problems solved by technology

[0006] For each correction of the printing output, plate making and test printing are required separately, which consumes a lot of materials such as paper, plates, ink, etc. In addition, the correction time is generally more than half a day, and the loss of printing machine time is also very large , these will be paid separately by the printing factory, which increases the printing cost

Moreover, this correction method is directly compensated from the dot gain of the zero dot compensation curve to the target dot gain, and the compensation range is relatively large. In actual production, the dot gain curve often generated has large fluctuations, and the output after compensation is in line with the target curve. There is no guarantee for matching, and multiple compensations are required, and the consumption will increase accordingly

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