Two related materials are extruded simultaniously to form one parison. This processing of 2 layers is used when the inner main layer of the container (consisting of virgin material and regrind) is to be covered by a high quality outer layer (virgin material and color). Only the "DeCorational" outside layer is visible.
By doing so a cost effective solution can be offered on color concentrate, especially on high priced pearlized colors.
Soft-touch material is also used in this application.