Black grey four-color offset printing ink based on H-UV (High sensitivity-Ultra Violet) printing

Abstract

The invention provides black grey four-color offset printing ink based on H-UV (High sensitivity-Ultra Violet) printing. The black grey four-color offset printing ink comprises blue black ink CK, redblack ink MK, yellow black ink YK and extra black ink BK which are used as printing four-color ink; the Lab values of the four-color ink are respectively as followings: blue black ink CK (L=53.50+ / -2,a=1.50+ / -1, b=-2.0+ / -1), red black ink MK (L=68.40+ / -2, a=2.5+ / -1, b=3.0+ / -1), yellow black ink YK (L=76.0+ / -2, a=0.95+ / -1, b=5.0+ / -1), extra black ink BK (L=10.98+ / -2, a=0.35+ / -1, b=0.30+ / -1). The black grey four-color offset printing ink for H-UV printing has the advantage that when a black white image product is printed by a four-color flat offset printing H-UV process, the pure black white high-quality printing effect can be achieved.

Description

technical field [0001] The invention relates to the technical field of printing, in particular to a black and gray four-color offset printing ink based on H-UV printing. Background technique [0002] Conventional lithographic offset printing uses oil-based ink. When printing with this kind of ink, the printed sheet needs to be left at room temperature for 12-24 hours. The next process can only be performed after the ink on the printed sheet is completely dry, which greatly reduces production efficiency. At the same time, after the printed product is completely dry, the ink will dry out, that is, the ink density after complete drying will be lower than that of the undried ink, which will make the color of the printed product 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 dries and cures ink by ultraviolet lig...

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