Four-color wide-color-gamut offset printing ink for H-UV printing

Abstract

The invention provides a four-color wide-color-gamut offset printing ink for H-UV printing. The four-color wide-color-gamut offset printing ink comprises magenta printing ink M, blue printing ink C, yellow printing ink Y and black printing ink K, which are used as four-color ink for printing. The Lab values of the four-color ink are respectively as follows: magenta printing ink M (L=52 + / - 5, a=81+ / - 5, b=-13 + / - 5), blue printing ink C (L=53 + / - 5, a=-36 + / - 5,b =55 + / - 5), yellow printing ink Y (L=89 + / - 5, a=-3 + / - 5, b=110 + / - 5), and black printing ink K (L=10 + / - 5, a=0 + / - 5, b=0 + / - 5). According to the four-color printing ink for H-UV printing, the color range of printing ink is broadened, the color is saturated, the printing efficiency is improved in the application process, a printing product with a wider color gamut can be produced, and the quality of the printed product is improved.

Description

Technical field [0001] The invention relates to the field of printing technology, in particular to a four-color wide-color gamut offset printing ink for H-UV printing. Background technique [0002] Conventional lithographic offset printing uses oil-based ink. When printing with this type of ink, the printed sheet needs to stand at room temperature for 12-24 hours, and the next process can only be carried out after the ink on the printed sheet is completely dried, which greatly reduces production efficiency. At the same time, the ink will dry out after the printed product is completely dried, that is, the ink density after completely drying will be lower than the ink density when it is not dried, causing the color of the printed product to deviate and it is difficult to control the product quality. [0003] On the basis of this printing technology, a UV (Ultra-Violet Ray) printing process is proposed. The UV printing process is a printing process that uses ultraviolet light to dry a...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of the H-UV process in the above-mentioned prior art are: there is currently no H-UV wide-color gamut four-color special ink suitable for the H-UV process. Due to changes in the drying method, the formula components and proportions in the ink need to be adjusted accordingly. Adjustment

However, due to the particularity of the drying method, there is no time for the ink to level after printing on the paper

Therefore, the printed matter produced by the H-UV process is dull in color, poor in gradation, strong in graininess, not delicate in image, small in color gamut, and the color effect is not outstanding compared with traditional offset printing.

Although the UV drying process improves the production efficiency very well, the product quality has declined, and the quality and efficiency cannot be considered, and it cannot meet the customer's demand for high-quality printing.

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