# Last edited on 2016-12-15 18:31:06 by stolfilocal

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2016-11-05

Initial preparation

Some ~60 g of very old urucum seeds (many years) were
washed in ~100 ml of 92% ethanol, in two washings.

In each washing the seeds were covered with ethanol
then forcibly stirred by many minutes.  

The ethanol was decanted and filtered, yielding a red-orange clear
filtrate and a brown residue insoluble in ethanol.

The rsidue was placed in an eflask with ~25 ml of vimak, and was
partly dissolved yielding a yellowish clear solution.