cobalt pigment

As usual, (ME120) deposited black flakes and crust in the ethanolic phase.

The green liquor (ME160) became clear brown, instead of blue. So the blue vs green is not a matter of pH?

The blue liquor (ME162) became smoky on standing for a few hours, but was still blue.

Washed the black ppt (ME121) with H2O, dumped the wash into alcaline residue flask (MG0). Washed the ppt off the filter into filter of filtration ((1)), that is (ME151).

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