How to solve gold foil powder stuck off by ink during gold foil process?
Time:2022-10-11
Views:1966
In the process of new product design and development, process personnel in order to highlight the product theme, often use a special gold foil process, that is, finished the gold foil process then print.
Not only that, gold foil powder will reach the ink roller through transfer, accelerate the wear of the ink roller, causing damage to the printing equipment.
From the above analysis, it can be seen that if you want to use the gold foil after printing process, it is necessary to eliminate the problem of gold foil being stuck off in the printing process, to solve the problem of gold foil being stuck off can be started from the following two aspects.
1. Control of the gold foil quality
Gold foil quality is the premise of ensuring the normal follow-up printing production. First of all, according to the different surface properties of the paper, choose the right gold foil. Electrochemical foil after gold foil will generally have a great contrast with the background, on the gold foil brightness effect do not worry, the key is to ensure that gold foil firmly attached to the surface of the paper.
To achieve this goal, in addition to the hot gold foil selection efforts, but also strictly standardize the operating procedures of machine personnel. In addition to the requirements of the machine staff to control the gold foil temperature, gold foil pressure and gold foil speed, it is more important to regularly gold foil layer adhesion test. Because in the gold foil process, the adhesion between the gold foil layer and the paper may change as the number of gold foil increases.
Adhesion test using the adhesive test method is specific: adhesive tape to gold foil layer, quickly pull off the tape. In general, if the gold foil layer can not pull off, printing will not appear ink reverse gold foil. If the gold foil layer is pulled off by the tape, it indicates that the gold foil layer is not firmly attached, and it needs to be corrected again. When the calibration pressure reaches a certain number of times, gold foil quality will tend to a stable state.
2. Control of printing process
General offset printing ink viscosity is relatively high, in the printing process on the surface of the paper tension. Can be reduced by appropriate ink viscosity to alleviate this contradiction. In addition, under the condition of ensuring normal printing, the less printing pressure, the better.
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