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MordantA mordant is a substance used to set dyes. A mordant is either inherently collodial or produces colloids and can be either acidic or basic. Mordants include tannic acid, alum, chrome alum, and certain salts of aluminum, chromium, copper, iron, potassium, and tin. A mordent (note the different spelling) in music is also a type of musical ornament: see Ornament Categories: Dyes
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