This section is from the "Henley's Twentieth Century Formulas Recipes Processes" encyclopedia, by Norman W. Henley and others.
Most laundry starches now contain some polishing mixture for giving a high luster.
Dissolve in a vessel of sufficient capacity, 42 parts of crystallized magnesium chloride in 30 parts of water. In another vessel stir 12 parts of starch in 20 parts of water to a smooth paste. Mix the two and heat under pressure until the starch is fluidified.
Pour 250 parts, by weight, of water, over 5 parts, by weight, of powdered gum tragacanth until the powder swells uniformly; then add 750 parts, by weight, of boiling water, dissolve 50 parts, by weight, of borax in it, and stir 50 parts, by weight, of stearine and 50 parts, by weight, of talcum into the whole. Of this fluid add 250 parts to 1,000 parts of boiled starch, or else the ironing oil is applied by means of a sponge on the starched wash, which is then ironed. By weight
Borax ........... 9 parts
Common salt..... 1 part
Gum arabic...... 8 parts
Stearine......... 20 parts