Acids
Act quickly when an acid has been spilled, for it may damage the cloth or destroy the color. First, wash the stain with cold water to stop the action of the acid. Rinse several times in cold water; then apply ammonia water or baking soda. Water alone will not restore color, but ammonia water may.
Baking soda.—Sprinkle soda on both sides of the stain, moisten with water, and allow to stand until the bubbling stops. Rinse well with water.
Ammonia water.—Hold the dampened stain over an open bottle of strong ammonia water; or if the material doesn’t water-spot, put a few drops of ammonia water, diluted to half strength on the stain. Since ammonia water affects some dyes, have white vinegar ready to apply quickly if the color changes. Rinse well with water.