This blue is distinguished from smalt by dissolving in acetic acid.
What is the legal requirement in this state for acetic acid in vinegar?
When used, moisten the gums with a little of the acetic acid diluted.
Dissolve the gallic acid, sesgurichloride, and add the acetic acid.
Rub with acetic acid (see) behind the ears, but not so as to cause soreness.
Acetic acid never ...