cobalt pigment

Filtering (MEF2q) (blue liquor extracted from carbonates with (H1), plus ethanol):

* (ME130) liq, 2 phase: (top, clear white ethanolic) + (bot, clear blue).

* (ME131) ppt, olive black powder.

Filtration was fast.  Washed (ME131) with H2O.  Wash water (ME132) was clear very light yellow.  

Added some ethanol 99% to (ME130) and shook.  The clear blue phase became smoky. 

Merged (ME132) and (ME107).  Mostly NaOH; pH ~13.

Discarded clear white supernat of test tube (MH1), leaving the strong lilac ppt.  Added some 2 mL of the supernat of (MF0) and 1 mL of HAc to the ppt of (MH1).  Intense bubbling.

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