Why Do Plastic-colored Products Fade?

Plastic-colored products will fade due to many factors. The fading of colored plastic products is related to the light resistance, oxygen resistance, heat resistance, acid, and alkali resistance of the toner, and the characteristics of the resin used. The following is a detailed analysis of the fading factors of plastic coloring:

1. The light resistance of the colorant

The lightfastness of the colorant directly affects the fading of the product. For outdoor products exposed to strong light, the light fastness (light fastness) level requirement of the colorant used is an important indicator. The lightfastness level is poor, and the product will quickly fade during use.

The light resistance grade selected for weather-resistant products should not be lower than six grades, preferably seven or eight grades, and indoor products can choose four or five grades.

The light resistance of the carrier resin also has a great influence on the color change, and the molecular structure of the resin changes and fades after being irradiated by ultraviolet rays.