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Metamerism Print
Metamerism is simply described as the colour of two samples appearing identical under one light source but different under another light source. It is a problem that can be impossible for colourists to resolve. Metamerism can only occur if the colourants used in the standard and the sample are different. This can very often occur if for example polystyrene, PVC and ABS are matched to the same colour. This is because colourants used to co our PVC may not be suitable to colour polystyrene or ABS. This results in different colourants being used and thus metamerism.