DS DS/EN ISO 787-25
DS DSEN SO 787-25 2007-FEB-19 General methods of test for pgments and extenders - Part 25 Comparson of the colour n full-shade systems of whte black and coloured pgments - Colormetrc method
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This part of ISO 787 specifies a general test method for comparing the colour, in full-shade systems, of white, black and coloured pigments with that of an agreed reference pigment, using a colorimetric procedure.