Merged  (MK16) (dark red-pink clear), (MK17) (pink clear) and some supernat of (MK18) (dark pink) to (MK23).

Filtered (MK23) to remove paper bits, added filtrate to (MK25).

Put paper filter with traces of (MK18) plus the filter paper with (MK21) (small amtblack ppt) into clean erlen (MK26),with H2O and ~8 mL HCl 20%.

Prepared another batch of (H1), NaOH 50%. Namely, 95.6 g NaOH + 96.6 g H2O.
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