
thumb|200 px|Mordant red 19 is a typical mordant dye. Like many mordant dyes, it features the [[azo group (RN=NR) and various sites for chelating to metal cations.]] thumb|A French Indienne, a printed or painted textile in the manner of Indian productions, which used mordants to fix the dyes
thumb|200 px|Mordant red 19 is a typical mordant dye. Like many mordant dyes, it features the [[azo group (RN=NR) and various sites for chelating to metal cations.]] thumb|A French Indienne, a printed or painted textile in the manner of Indian productions, which used mordants to fix the dyes
A mordant or dye fixative is a substance used to set (i.e., bind) dyes on fabrics. It does this by forming a coordination complex with the dye, which then attaches to the fabric (or tissue). It may be used for dyeing fabrics or for intensifying stains in cell or tissue preparations. Although mordants are still used, especially by small batch dyers, they have been largely displaced in industry by substantive dyes.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).