The main factors that cause the printing pattern to fade are air, light and heat, because there is oxygen in the air, oxygen and ink will produce an oxidation reaction, which has a great effect on the color of the pattern. There are many reasons for the discoloration of the print pattern. First, the most important thing is the printing material. If the print material is relatively soft, the gap between the particles is larger, and air touch with the surface is very large, it will be easy to fade. If the material is smooth and relatively hard, under the normal circumstances, it is not easy to fade, but if the sun exposure, it will fade.
The best way to keep the pattern durable is to use the appropriate ink, and after the completion of the printing to do post-protection treatment. But if it is in the ultraviolet and ordinary incandescent light will also fade. So if you want to keep the pattern does not fade for a long time to do the following two points:
1, To use the good sealing ink, which is the basic condition to ensure that the pattern does not fade for a long time. Do not choose the ink which has a long shelf life, because it’s particles is large, the internal is not easy to be oxidized, will damage the effect of the pattern.
2, To put the printed pattern in the shade, to ensure that the pattern is not subject to strong light exposure.