The mordant most frequently used by natural dyers for animal and cellulose fibers and fabrics. It improves light and washfastness of all natural dyes and keeps colours clear. It is inexpensive and safe to use (but should not be ingested). This form of alum is refined from bauxite, the raw state of aluminum ore, and is free from the impurities some other alums can contain (such as iron). Use at 12-20% WOF.
Set of 12 scarves. Our sets are discounted to sell at wholesale pricing (approx. 40% less). This buttery cotton mull has a beautiful hand and is a pleasure to dye. Maiwa loves these shawls for all it's indigos and natural dyes. The generous size means you have a substantial shawl, scarf, wrap or sarong. It has a clean finish with a rolled hem.
Ferrous sulfate or iron is an optional mordant and is used as a colour changer. It has the added benefit of making naturally dyed colours more light and washfast. It is more often used with cellulose fibers like cotton, linen, rayon and hemp and should be used with care on protein fibers as it can make them slightly hard or brittle. Iron shifts a colour to a deeper, darker shade. If used in the mordant process that shift is more distinct than when used directly in the dyebath. Iron should be used at 2-4% wof. More than that could damage the fiber.
Indigo (natural) – natural indigo powder is an extract prepared from Indigofera tinctoria which is cultivated for this purpose. Indigo is the legendary source of colourfast blues and its ability to produce a wide range of shades has made it the most successful dye plant ever known. Indigo grows all over the world but flourishes best in hot, sunny, humid areas. Indigo can give clear blues that range from the tint of a pale sky to a deep navy that is almost black. Our indigo comes from a farm in south India and is very strong (approx 50% indigotin). It reduces beautifully in an indigo vat. See Maiwa's Indigo Data Sheet for complete instructions.