Abstracts

This is an attempt to understand the processes which take place during the dispersion of organic pigments in PVC‐based application media. It transpired that when the pigments are incorporated using a two‐roller mill, the crucial stage is the mechanical disintegration of the agglomerates. The results were achieved in a temperature range of 110 to 180°C, and were independent of the plasticiser content. Several variables were considered, and due allowances were made.