Sinopigments pearl pigment should be well oriented in the film by giving ,moderate FLOW and PRESSURE .
When processing pearl pigment in a plastic material, optimum pearl luster effects are achieved only if the pearl pigment platelets are well orientated,i.e. If they are directed as parallel as possible to the surface of the plastic material.
Pearl pigments should be mixed with a plastic material thoroughtly but gently. Some dispersant shoud be used at need
When dispersing pearl pigments within plastic material, it is important to avoid overgrinding or overmilling, since this would fracture the plate-like flake structure into smaller light-scatering particles, producing less lustrous appearance.
Insufficient dispersion of other colorants cause the particle size of other colorants to change due to pearl pigment.
Cleaning condition of processing machines is also very important to application. If the cleaning condition of the molding machine is bad , when pearlized plastic material is flow in the molding machine, pearl pigment scrapes dust in molding machine, and this dust appears on the final product as foreign matter.
Pearl pigment used in combination with other colorants in order to hide backgroud color and /or hide interior of the final product.(e.g. Bottles) For a good pearl luster effect, it is a very important factor to combine and /or balance between pearl pigment and other colorants.
When using the backgroud layer,(e.g. Multilayer blow molding). It is important to check backgound color |
