Offset point aluminum plate electrolytic graining process

Abstract

The invention discloses an offset point aluminum plate electrolytic graining process. An aluminum plate carries out three-phase alternating current electrolysis, and the electrolyte is a mixed solution of hydrochloric acid, phosphoric acid and water. During the electrolysis, the temperature of the mixed solution is between 26 and 32 DEG C, and the electrolysis time is between 1 and 120 seconds. The invention can form uniform grains, and in addition, uniform photosensitive coating layers can be easily formed, so the light transmission capability is optimum, the original sensing degree is improved, the plate making time is reduced, and the efficiency is improved.

Description

technical field [0001] The invention relates to an electrolytic sand mesh process of an offset printing aluminum plate. Background technique [0002] The traditional offset printing aluminum plate electrolysis sand mesh process uses hydrochloric acid or nitric acid solution as the electrolyte, the current is 1000A, the liquid supply method is overflow type, and the pole distance between graphite and aluminum plate is as long as 18mm. Although this process has many layers Sand mesh, but not uniform, and the sand mesh is relatively coarse, which has a great influence on the quality of the aluminum plate after coating. Contents of the invention [0003] The invention provides an electrolytic graining process for offset printing aluminum plates, which can not only form uniform grains, but also easily form a relatively uniform photosensitive coating, so that the penetration of light can be optimized, and the original sensitivity can be improved. Reduce plate making time, impro...

AI Technical Summary

Problems solved by technology

[0002] The traditional offset printing aluminum plate electrolysis sand mesh process uses hydrochloric acid or nitric acid solution as the electrolyte, the current is 1000A, the liquid supply method is overflow type, and the pole distance between graphite and aluminum plate is as long as 18mm. Although this process has many layers Grain, but not uniform, and the grain is relatively coarse, which has a great influence on the quality of the aluminum plate after coating