Home
 Adhesives
 Beverages
 Confectionary
 Candles
 Chewing Gums
 Cosmetics
 Lacquer Formulations
 Detergents
 Disinfectants
 Dyes
 Fertilizers
 Fluorescent Liquids
 Fruit Preserving
 Fumigants
 Gold
 Hair Preparations
 Inks
 Insect Bites
 Insecticides
 Insulations
 Perfumes
 Soaps
 Polishes
 Shoe Dressings

Blueprint Inks

1. – For red-writing fluids for blue-prints, take a piece of common washing soda the size of an ordinary bean, and
dissolve it in 4 tablespoonfuls of ordinary red-writing ink, to make a red fluid. To keep it from spreading too much,
use a fine pen to apply it with, and write fast so as not to allow too much of the fluid to get on the paper, for it will
continue eating until it is dry.

2. – For red and white solutions for writing on blueprints, dissolve a crystal of oxalate of potash about the size
of a pea in an ink-bottle full of water. This will give white lines on blueprints; other potash solutions are yellowish.
 If this shows a tendency to run, owing to too great strength, add more water and thicken slightly with mucilage.
Mix this with red or any other colored ink about half and half, and writing may be done on the blueprints in colors
corresponding to the inks used.