Reverse sanding process

Abstract

The invention provides a reverse sanding process comprising the following steps that: (1) a ceramic anilox roller with 80-120 wires is utilized, and the requirements are as follows: in the area with one square meter, more than 40000 ink cells exist, the angle of each ink cell is 60 degrees, and the depth of each ink cell is 13-33micrometers; (2) the temperature of a production environment is kept between 22 DEG C-29 DEG C, and the humidity is controlled between 45 degrees-65 degrees; (3) single-set colorless transparent ultraviolet (UV) light curing oil ink and single-set colorless transparent UV light curing UV are selected, and the viscosity is 45-60PaS; (4) five 15KW UV lamps are selected, the wavelengths of ultraviolet rays of the UV lamps are 200-400, the first group of control power and the second group of control power are 50%, and the control power of the three UV lamps of a paper absorbing drying channel is 100%; and (5) the printing is conducted according to an existing offset print operation procedure. According to the reverse sanding process provided by the invention, the printing and sanding process of printing materials with six colors or less then six colors can be completed at one time, the large-area sanding and surface mirror effects can be realized, and the printing precision problem can be solved effectively.

Description

technical field [0001] The invention belongs to the field of printing, and in particular relates to a reverse frosting process. Background technique [0002] In China, the main substrate of UV printing is non-absorbent material. In Europe and the United States, printing manufacturers not only use the co-curing process to print prints of the same quality as traditional UV inks, but are not satisfied with its only high-gloss mirror effect or transparent effect, and further improve this process to achieve more High printing contrast. [0003] Reverse frosting is relative to traditional local glazing. In the past, no matter what kind of glazing method (flexographic printing, screen printing or gravure printing) was used for partial glazing, the last glazing process must use partial glazing plate printing to achieve high-contrast effects of local graphics and texts. , The overprint accuracy of glazing and printing has become the key to the glazing process. [0004] The common...

AI Technical Summary

Problems solved by technology

[0004] The commonly used reverse frosting process generally goes through two machine runs, one machine to complete the printing, and the second machine to enter the sanding process after semi-drying, which often fails to meet the high-precision requirements