shades of malachite, Ueba Esou, Kyoto
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Description from the KREMER PIGMENTS website:
The special Japanese elutriation treatment ensures a more exact and equal grain size than just by sieving and the colors are very brilliant
The numbers stand for sizes: No. 8 = 50 µ, No. 10 = 27 µ, No. 12 = 14 µ, No. 14 = 5 µ.
Chemical Formula: Cu2(CO3)(OH)2
Chemical description: Basic copper carbonate
Pigments are first passed trough a series of sieves, then they are separated by several processes of sedimentation with very pure water, see video.