Violet Copying Ink
For blue violet dissolve in 300 parts of boiling
water, Methyl Violet, 5 B, Hofman's Violet, 3 B, or Gentiana Violet, B.
For reddish violet dissolve in a similar quantity of water Methyl
Violet BR. A small quantity of sugar added to these inks improves their
copying qualities. If the writing when dry retains a bronzy appearance,
more water must be added.