Mordants and Assistants
- Check the order chart below the information to see what is orderable. If it is not in the order chart. . . it is not currently orderable.
- Calcium Carbonate - Finely ground limestone - low magnesium - high calcium.
- Calcium Hydroxide - AKA hydrated or slaked lime. High purity - low in magnesium. Highly alkaline - handle with care.
- Citric Acid - Safe acid fixative for wool fibers and acid mediums. Granular, dissolves in water.
- Copper Sulfate - The standard copper mordant: cupric sulfate pentahydrate; common name: blue vitriol. Poisonous Handle with care, see warning label.
- Cream of Tartar - Potassium bitartrate; dye assistant most often used with alum and tin mordants on wool and silk.
- Ferrous Sulfate - The standard iron mordant: ferrous sulfate heptahydrate; common names are copperas and green vitriol. Poisonous: Handle with care, see warning label.
- Soda Ash - Anhydrous sodium carbonate; Chemically the same as washing or sal soda, but 2.5 times stronger. Highly alkaline; handle with care
- Sodium Sulfate, Anhydrous - Chemically the same as glauber's salts, except more concentrated (2 1/4 times stronger).
- SpectraliteŽ: A brand name for thiourea dioxide; used as a reducing agent in indigo dye vats; and as a bleach (stripping agent) to remove some kinds of synthetic dyes. Strong reducing agent, handle with care.
- Tannin, dry extract:Tannin is usually used on all Vegetable fibers because it helps either the mordant of Alum or any of the others adhere to the fiber better. Tannin can be used as a pre-mordant or alone as a mordant but most of the sources suggest using the Tannin first or also in the all in one dye method for best results on all vegetable fibers.
- Tannic Acid: Tannic acid is a common mordant used in the dyeing process for cellulose fibers such as cotton, often combined with alum and/or iron. The tannin mordant should be done first as metal mordants combine well with the fiber-tannin complex. However this use has lost considerable interest.
Similarly tannic acid can also be used as an aftertreatment to improve wash fastness properties of acid dyed polyamide. It is also an alternative for fluorcarbon aftertreatments to impart anti-staining properties to polyamide yarn or carpets.
- Tara Powder: Ground seed pods of the plant Caesalpinia spinosa; about 50% tannin; a good neutral-colored source of tannin for mordanting cotton, logwood blacks, etc
- Tartaric Acid: Chemically similar to cream of tartar, but shifts pH more toward acidic.
- Tin (Stannous Chloride): Caustic, handle with care, see warning label.
- Zinc Dust:Finely powdered zinc metal. Flammable, toxic if ingested. Store away from acids & oxidizing agents