I have reason to believe, however, that gallic acid is only soluble in
water to about 9/10s percent and my experience of it in some (useless)
concoctions was that even getting that amount into solution required
heating, and in a cold room, like as not, it would soon precipitate out
again.
Alcohol added to the water did better but was hateful when applied to the
paper.
Any comments? Am I missing something? (I crossed those formulas off
list, assuming perpetrator unreliable.)
Judy