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DIN EN 12877-4:2000
Determination of colour stability to heat during processing of colouring materials in plastics - Part 4: Determination by two-roll milling
The document describes a method for determinating the colour stability of colouring materials under defined conditions in plastics by two-roll milling. The result of the determination is a relative value, not an absolute one. The method is mainly applicable for testing colouring materials in polyvinyl chloride.
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Deutsches Institut für Normung [din]