1. How to solve the problem of pitting in the product after etching by the etching machine

 

When printing on an aluminized film or coloring on a white ink image, the cohesive force of the resin binder in the ink or the ink system is too large, and the resulting needle (blank point/pitting) is faulty. The general treatment method is: It is a secondary spray ink: the second is to add a lightening agent to the ink; the third is to add a defoaming agent; the fourth is to add a thickening thickener; the fifth is to (gravure) the scraper to move up a bit; the sixth is to add a new one in the ink fountain Stirrer; seventh is to use a resin with small cohesive force as the binder of the ink; eight is a flat and antistatic ink or slow down the printing speed, and strive to eliminate the failure of pitting, pinhole, spot, white point Purpose. There are many ways to remedy the etched pitting.

 

2. How can the printing ink not lose its gloss?

 

After film formation, it can improve adhesion without losing gloss. This requirement is understandable. Some ink manufacturers often use wax additives to increase the wetting and squeezing properties of the ink film, but excessive addition often leads to The loss of light of the ink film is difficult to dissolve with the rubber compound even when the overprinting compound is combined, thereby reducing the holding force. For this reason, Foshan Xinhengli adopts the method of adding a coupling agent, thereby improving the branching degree and printing of the printing ink. The affinity of the object, thereby changing the interfacial properties between the polymer and the pigment filler, thereby improving the interfacial adhesion of the printing ink and improving the gloss of the ink film. This chemical reaction occurs to generate The Si-O-Si chemical bond couples the ink and the substrate, which is the origin of the coupling agent.