Color decoration technology analysis - one of troubleshooting

Some failures and defects are easily caused in color decoration. The following countermeasures are mainly adopted.

1. Discoloration

In the course of use, the color of the ink film changes, and its hue, lightness, and chroma greatly deviate from the standard color mark.

the reason:
(1) It is caused by the action of eyesight (mainly short-wave zone), humidity, high temperature, and corrosive gases (such as sulfur dioxide) in the air;
(2) The weatherability of the ink used is poor;
(3) The organic pigment migrates through the ink film during aging of the ink film, precipitation of the plasticizer, and the like.

(1) Select the appropriate ink according to the conditions of use of the substrate;
(2) Select an ink with excellent weatherability.

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