1. Light fastness

Plastic coloring parts are always used in a certain light conditions, so the plastic light fastness of the colorant is a very important indicator. Poor light fastness, decreases so that the loss of it as the real value of plastic colorants. For example used for base of polystyrene shaded rose essence and other stains, in terms of colour and lustre and heat resistance are quite good, but because of the poor light fastness, made of colored plastic products in use will soon fade, and thus be eliminated.

2. Resistance transference is better

Plastic colorants have mobile and migration cream comes in two forms.

(1) the migration It refers to the plastic colored pieces and other plastic parts (or other objects in contact, with the passage of time, the coloring gradually from the colored plastic parts (or other object) on this phenomenon.

(2) the frosting It refers to the plastic color stain in the parts, in the process of parts used or stored, precipitation from inside the plastic parts, focused on the plastic parts on the surface of the phenomenon. Focused on the frosting phenomenon on the surface of the plastic parts make the colorant wiped off easily, cause contact pollution.

3. The use of other requirements

(1) some non-toxic plastic parts, such as children's toys, plastic packaging materials of food or drug use, etc., all hope to be able to use avirulent stain.

(2) chemical resistance Chemical resistance is frequently encountered is acid resistance, alkali resistance, resistance to oxidizing and reducing, and so on.

(3) electrical insulation Many colorant will affect the plastic products in different degrees of electric insulation performance, for cable, wire insulation with plastic and electrical parts of plastic parts used for coloring, for electrical insulation of the colorant, should especially pay attention to them