Children Coloring Paper Puzzle chrominance measurement in the printing industry

Children Coloring Paper Puzzle chrominance measurement in the printing industry

At present, in the printing industry, there has been a great deal of interest in the use of colorimeters or spectrophotometers for measurement. Because practice has proved that, although density measurement is very important, but for the printing industry, density measurement is not enough. In the past, due to the limitation of measuring instruments, density measurement has been the most commonly used form of measurement in the printing industry. Now things are different, with the gradual promotion of new measuring instruments, people have begun to focus on chrominance measurement technology. Chrominance measurement has been used in printing process control, such as the control of ink layer thickness.

In the printing industry, the study of chrominance measurement is useful for understanding color processing, product and instrument design, and chrominance measurement has some obvious advantages.

At present, chrominance measurement in the printing industry is mainly used in the following aspects:

① The quality control of raw materials, especially the control of ink and paper, in some printing plants, this has become a routine work. The spectrophotometric data is very valuable to measure the whiteness of paper.

(2) Develop the exact specification of ink and paper standards;

(3) Analysis and measurement of gray balance, optimal tone reproduction and color correction according to different ink, paper and printing conditions;

(4) Analyze the matching between the color of the proof and the printing paper, and analyze the chroma characteristics of the pigment used in the pre-proofing process;

(5) Analysis of a set of ink reproduction color gamut and different sets of ink reproduction color gamut;

⑥ Analyze the relationship between the original manuscript and the copied image;

The use of chrominance measurement standards, improve the degree of standardized production, in order to save materials, reduce errors, improve the quality of products;

⑧ Quality control of printing color;

⑨ Analyze the composition of pigments matching spot colors;

Accurate color calibration on the color separation equipment and control of color reproduction on the press.

In the printing industry, chrominance measurement is an extension of the function of the eye, but it will never replace the eye, because only the eye has the function of subjective judgment. But instruments can produce quantitative data that can be placed anywhere they can, such as on a printing press.