Young's Demonstrative Translation of Scientific Secrets · Chapter 162413. Gum-Arabic Starch

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Take 2 oz. of white gum-arabic powdered finely; put it into a pitcher and pour on it a pint of boiling water; then cover it and let stand all night; in the morning pour it carefully from the dregs into a clean bottle; cork and keep it for use. A tablespoonful of this gum water stirred into a pint of starch that has been made in the usual manner will give to launs either black, white, or printed, the appearance of new, to which nothing else can restore them after washing. It is a good article for collars and shirt bosoms; also, when much diluted, for thin white muslin and bobbinet.