1. Empirical color matching
Experiential color matching refers to color
matching only based on the experience and feeling of colorists without color
measuring instruments. In the early stage, it is based on the experience
accumulated by colorists in practice. In the middle and late stage, 10 basic
color maps or printing chromatograms are used as reference standards for visual
color measurement. Experience color matching method is often affected by
physiological and psychological factors of colorists and other objective
conditions in book printing process, so
it is difficult to maintain stable product quality. In addition, relying on
experience and feeling, color matching can only be qualitative, but not
quantitative, so it is difficult to spread and communicate technology.
2. Mechanical color matching
Mechanical color matching method is a more
advanced color matching method gradually popular in modern times. In all
aspects of color matching, certain machinery and instruments are used as
configuration and measurement tools, and curves and charts are drawn as the
reference basis for color matching, so that the color matching work can be
carried out in a relatively accurate range. This method changes some blindness
of the previous experience color matching in book printing process, and improves the speed and quality of color matching, but the accuracy
of color matching is low and the error is large.
3. Computer color matching
Computer color matching has a history of
about 30 years in foreign countries and has been applied in many color
departments at home and abroad. People use the connection between the color
database stored in the computer and the relevant color matching software to
analyze and process the color data on the sample manuscript. Through
calculation, correction and color matching, the color formula suitable for the
requirements of the sample is selected, and then the automatic color matching
of ink is completed. Computer color matching requires that the colors of
standard color samples and ink samples are expressed in numbers, which ensures
the accuracy and uniformity of each color matching, and saves color matching
time greatly. It is convenient, fast, rapid and accurate for book printing. However, the
color matching software developed by different enterprises and companies is
developed on the basis of considering their actual production and application
conditions. There is no unified standard, which is one of the reasons why
computer color matching cannot be popularized.
