Ask why the ink that is printed on the carton will fade? How to prevent fading?
Because the use of professional language is different, understanding may also be one-sided, I think the problem is that the top of the carton of ink wear resistance is not enough, hand touch fade, moving may rub on the clothes.
Therefore in ink on a layer of light oil, in order to increase the wear resistance. If that's what I mean, I think about grinding flowers for the following reasons:1. boxes of cardboard surface, paper powder is too much, so that ink adhesion is not good.2., the ink itself is not enough cohesion, or water dilution excessive, so that the ink in the resin composition can not cover pigment particles, so that the color particles exposed, and easy to fade.3., dry ink after water resistance is not enough, ink film dissolved in water.4., ink film surface smoothness is not enough.The 5. part of the black Moyin carbon black is not easy to be coated and fade.
Carton factory in order to prevent fading, often on the surface of the carton or part of the design, cover a layer of moisture proof oil (or varnish), both to prevent ink fade, but also increased brightness of bright patterns. Full light moisture proof cover used offset printing machine (roller coating machine) India moisture-proof oil. Others brush a layer of emulsified fat with a brush map. It is now commonly used as varnish made from rosin resins (MA resins) or acrylic resins to resist moisture. At the same time, the carton strength index is also increased.
