Using UV glazing print, can appear sometimes yellowing phenomenon, its main reason has two: one is the yellow UV glazing oil;
The second is in the process of polishing, polishing oil only in the print surface curing.
And internal is not completely cured.
Glazing oil yellow, instead of the oligomer and reactive diluent with some yellow, so should choose colorless oligomer and reactive diluent to make oil polish.
In addition, the influence of light initiator is big, there are some yellow light initiator can make the system after curing, such as benzoin methyl ether, so should avoid to use these light initiator preparation glazing oil.
In the process of polishing, polishing oil inside there is no completely curing, its internal oil polish thinner gradually absorbed by the ink, paper, at the same time can produce effect of ink in the link, cause fat loss.
Pigment is not enough protection, pigment particles.
This paper smoothness on the surface of the coating and printing & packaging
ink layer will reduce.
Rough surface can produce diffuse light, so add factory some white in color composition, raising the lightness, saturation decline, give a person with the feeling of whole yellowing, color lighter.
Therefore, we should improve the curing speed of UV glazing oil or choose efficient UV curing light source.
In addition, the waterborne UV glazing oil, can avoid thinner, ink and paper coating layer of chemistry, liu can avoid yellowing phenomenon in print.
At the same time, as the recent research of WenJie shows, the benefits of improved productivity and firm performance can make implementing basic management practices worth it.
Shenzhen Wen Jie Printing And Packaging Co., Ltd. humbly request you to try this item in your centers and we assure you that you would be in a great pleasure with the results.
Shenzhen Wen Jie Printing And Packaging Co., Ltd. knew the only way to remain competitive was to ensure quality of service and customer satisfaction above all.