What is spot color ink color matching technology?
07-31-2020 18:25:07

1. traditional color matching method for spot ink

In book printing China, the traditional spot color ink color matching method is based on the operator's skills and experience for many years, through observation, contrast way to color matching, generally suitable for small printing enterprises with low color requirements. However, in the process of use, many enterprises reflect that even if the color matching method is reasonable, the color difference between the printed product and the original manuscript is still very large, and the defective rate is high, which seriously affects the normal production.

It is understood that in the use of traditional spot color ink color matching method configuration of spot color and original spot color comparison, the general practice is to first carry out manual ink, and then with the original spot color comparison, in fact, this practice is unscientific. Because the uniformity and thickness of the ink layer greatly affect the color effect of the spot color ink, when the ink color after the ink is not different from the original color, the operator will mistakenly think that the spot color ink has been prepared and started printing. As a result, the color difference between the print and the original is far away. In this process, the traditional spot color matching method is combined with the mechanical ink leveling mechanism, which can reduce the color difference of printing products caused by subjective judgment errors.


In addition, the paper on the traditional spot-color ink color effect can not be ignored in book printing. The paper of different materials has different color effect on the printing product. In the process of making and comparing with the original, it is necessary to use the same paper as the printing material.

Even so, it is possible to produce the same color spectrum phenomenon because of the color error, which shows that the two color printed samples look the same under one light source, but they show differences under the other light source. Therefore, when conditions permit, try to use computer spot ink color matching.


2. computer color matching method


Large printing enterprises with high color requirements usually use computer spot ink color matching method. The principle is to first use spectrophotometer to determine the target color of book printing China. After processing by computer color matching software, the color information of the target color is displayed in the form of objective data, and then the basic color data stored in the database is used to match the color. When the color difference between the copy color and the target color is caused by the influence of raw material properties and process parameters, the computer color matching system will automatically correct the formula used and control the color difference within the allowable range.

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