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ISO 3668:2017
Paints and varnishes - Visual comparison of colour of paints
ISO 3668:2017 specifies a method for the visual comparison of the colour of films of paints or related products against a standard (either a reference standard or a freshly prepared standard) using artificial light sources in a standard booth.
It is not applicable to coatings containing special-effect pigments, e.g. metallic, without previous agreement on all details of illuminating and viewing conditions
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International Organization for Standardization [iso]
International Organization for Standardization [iso]