Classification of Copper Phthalo Cyanine pigment: minimum purity threshold reaffirmed for standardised ready-to-use status, subject to sample testing. CPC Blue qualifies as a standardised ready-to-use pigment for classification under Chapter Heading No. 3204.19 if it has a purity not less than 95% on a dry basis and the majority passes through a 100-125 mm sieve; earlier guidance is amended accordingly and pending assessments are to be finalised subject to sample testing.