Blue Ink
Dissolve one ounce of gum arabic in a pint of water. In a part of this gum water, grind a small quantity of best prussian blue; you may thus bring it to any depth of colour you choose.
A New England receipt book from the 1830s — cures, dyes, inks and kitchen secrets, preserved exactly as printed.
Dissolve one ounce of gum arabic in a pint of water. In a part of this gum water, grind a small quantity of best prussian blue; you may thus bring it to any depth of colour you choose.