This section specifies a method for determining the color thermal stability of colorants in plastics under specified conditions using the two-roller method. The measurement results are relative values, not absolute values. This method is mainly used to test colorants in polyvinyl chloride.
HG/T 4767.4-2014 Referenced Document
GB/T 11186.2-1989 Methods for measuring the colour of paint films--Part 2:Colour measurement
GB/T 11186.3 Methods for measuring the colour of paint films--Part 3:Calculation of colour differences
GB/T 250 Textiles.Tests for colour fastness.Grey scale for assessing change in colour
GB/T 3186 Paints, varnishes and raw materials for paints and varnishes. Sampling
HG/T 4767.1-2014 Pigment and extenders.Testing of colour stability to heat during processing in plastics.Part 1: General introduction
HG/T 4767.4-2014 history
2014HG/T 4767.4-2014 Pigment and extenders.Testing of colour stability to heat during processing in plastics.Part 4: By two-roll milling