PET rubber box printing in the fading of common causes

In the process of PET carton printing, the ink after drying is lighter than the ink after drying compared with the ink just printed. The main reason for this problem lies in the discoloration of the ink on the surface of PET carton caused by penetration and oxidative film formation during the drying process. Letterpress ink to penetrate the drying of the main ink layer is thicker, the penetration and oxidation of the film drying will take some time. In PET carton printing, the ink color should be controlled at a slightly darker degree than the original printed sample ink color, when the ink dries, it will meet the requirements of the sample ink color.

In practice, all PET carton printing ink will have different degrees of color fading and discoloration after exposure to light. After a long time in the light light color ink fading, discoloration is very serious. The actual PET carton printing in the ink, should try to use good lightfastness ink; at the same time in the deployment of ink should also consider the consistency of lightfastness between several colors of ink. The same blue ink, phthalocyanine blue than light lake blue, peacock blue light resistance, not easy to change color. If you add a little white ink color is more vivid. If you use peacock blue with chrome yellow ink, easy to fade over time, discoloration, yellowing.