Grocers' Goods / A Family Guide to the Purchase of Flour, Sugar, Tea, Coffee, Spices, Canned Goods, Cigars, Wines, and All Other Articles Usually Found in American Grocery Stores

by Frederick B. Goddard

Effects of Strong Soap on Fabrics.

Soap must not be strong enough to injure fabrics or discharge colors, yet sufficiently powerful to render grease and dirt soluble, so that it may be washed away in water. Rosin soap hardens the fibers of wool, and alkalies, if used to excess, shrink woolen fabrics. Hard water, or that containing lime or magnesia, more or less decomposes soap, and it floats on the surface as a greasy scum. But if an oily film rises to the top of soft water, it shows that the fat in the soap is not all saponified. Soft water is better than hard for fabrics.