Method for local vacuum evaporation on printing material

Abstract

The invention discloses a method for local vacuum evaporation on a printing material in order to overcome the shortcomings of serious waste of raw materials, harm of erosion operation to human bodies and the environment, troublesome cleaning of strong liquor and cleaning water, high purification and discharge cost, and no color gradation or level of a part of a metal color in the prior art. The invention adopts a technical scheme that: before the vacuum evaporation of the printing material, a layer of evaporation shield oil is printed on a set area on the printing material by a printing boardroller provided with patterns corresponding to the set area on the printing material; the evaporation shield oil layer is dried to a set dryness by a heater; and the printing material is subjected tovacuum evaporation to make the area without the evaporation shield oil completely cover a metal bright color layer and the area with the evaporation shield oil not cover or incompletely cover the metal bright color layer.

Description

technical field [0001] The invention relates to the surface treatment of printing materials such as bright gold, bright silver and other metallic colors on printing materials, in particular to a method for making partial metallic colors on printing materials including packaging film, composite film, transfer film or paper. Background technique [0002] Making partial metallic colors on printed materials is a long-standing printing decoration process. The initial method of making partial metallic color on the printing material is to use hot stamping process, that is to use the hot stamping template engraved with specific graphics and texts to hot-press the hot stamping foil on the printing material, and to press the hot stamping foil corresponding to the graphics and texts. Partially transferred to the surface of the printing material. [0003] Due to the high cost of the hot stamping process, the difficulty of the process, and the difficulty in quality control, the cold sta...

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to overcome the serious waste of raw materials in the existing method of using the transfer film vacuum evaporation post-treatment and transfer to realize the production of local metallic colors on the printing material, and the corrosion operation will cause harm to the human body and the environment, which is strong. The cleaning of lye and cleaning water is troublesome, and the defects of high purification and discharge costs; the second purpose is to overcome the defects of the existing methods of making partial metallic colors on printing materials, which have no color gradation or layers and monotonous forms of expression. The present invention provides an improved method for partial vacuum evaporation on printed materials, which can overcome the defects of the prior art