Colouring materials for plastics. Determination of colour stability at heat during processing of colouring materials for plastics. Part 2: Determination by injection moulding

This technical specification establishes a standardized methodology for evaluating the thermal stability of color in plastic coloring materials during the processing phase. Specifically, it focuses on the second part of a multi-part series dedicated to determining color retention through the injection molding technique. The procedure outlines the necessary experimental conditions, sample preparation requirements, and operational parameters to ensure consistent and repeatable results across different testing facilities. It defines the criteria for assessing how pigments and dyes withstand elevated temperatures associated with the injection molding process, providing essential data for manufacturers and quality control personnel. By adhering to these protocols, industry stakeholders can effectively monitor the performance of colored plastics under thermal stress. The method is designed to support the assessment of material compatibility and process suitability without altering the inherent properties of the coloring agents. This approach facilitates comparative analysis between different material batches or formulations, ensuring that color consistency is maintained throughout the manufacturing cycle. The documentation serves as a reference for technical professionals seeking to implement robust testing regimes within their production environments.