DS EN 14469-1:2004 Pigments And Extenders - Testing Of Colouring Materials In Plasticized Polyvinyl Chloride (Pvc-P) - Part 1: Composition And Preparation Of Basic Mixtures Defines a procedure for producing basic mixtures for the testing of colouring materials in plasticized polyvinyl chloride (PVC-P) materials, together with the composition of these basic mixtures.