cobalt pigment

Prepared (V2) = 10 mL HAc and 10 mL H2O.

Washing (ME103) (sly pinkish white ppt, like silica gel) with 9 mL (V2).  Washout (ME106) was clear very sly pink.  Added 36 mL NaHCO3 sol (sat 30 C): bubbling. Added 8 mL Na2CO3 sol (sat 16 C): bubbling stopped but no ppt. Still clear sly pink (maybe darker?)

Discarded (ME102) (clear white).

In test tube (ME106k) put 2 mL of (ME106) and 0.2 mL of K4Fe(CN)6.  Light tan ppt.
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