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Indigo – Pre-reduced
$9.70 – $74.97
Pre-reduced (or “instant”) Indigo comes as freeze-dried crystals, made in India. This saves the dyer the hassle of working with caustic lye to dissolve natural ground indigo into a stock solution.
All that’s required to be done is to dissolve the Indigo crystals in a bucket of warm water with Thiourea dioxide (a reducing agent that removes air from the vat), add Soda Ash (dissolved in boiling water) to raise the pH, stir together and wait an hour or two. Do this outside on a nice warm day, or indoors with good ventilation.
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Weld, Dried Chopped
Dried and chopped tops from Reseda luteola.
Use on protein or cellulose fibres. An ancient source of excellent bright yellows. Pre-mordanting recommended. Alum/c.o.t. mordant gives good results. Use at 30-50% WOF for medium shades.
TO USE: soak in water overnight, then simmer mixture at 160-175°F for 1 hour. Cool and strain. Add more water if needed and enter pre-mordanted fibre. Hold at a 160-175°F for one hour. The brightest yellows develop at these cool temperatures.
Light & washfastness: very good.
Kamala Powder
Ground dried fruits of Mallotus philippinensis, sometimes called Lotus Tree.
Use on protein fibres. Produces brilliant yellow and orange tones similar to Saffron. Pre-mordanting recommended. Use at 20-30% WOF for medium shades.
TO USE: needs alkaline conditions: dissolve in warm water with Soda Ash at 3% WOG. Add wetted, premordanted fibre and simmer at 160-175°F for 1 hour. Cool, then rinse fibre in water with 1 cup of vinegar to neutralize the pH.
Light & washfastness: very good.
Black Oak Bark, Ground
Ground inner bark of Quercus velutina, sometimes known as Quercitron.
Use on protein or cellulose fibres. A well-respected source of strong yellows. Pre-mordanting recommended. Alum/c.o.t. mordant gives excellent results. Use at 10-20% WOF for medium shades.
TO USE: simmer in water at 160-175°F for 1 hour. Cool overnight and strain. Add more water if necessary and enter pre-mordanted fibre. Hold at a 160-175°F for one hour. The brightest yellows develop at these cool temperatures.
Light and washfastness: excellent with a mordant.
Osage Orange, Shavings
Dried shavings from Maclura pomifera, a tree once widely planted in the US and eastern Canada for shetlerbelts. The wood is still used to make archery bows.
Use on protein or cellulose fibres. Pre-mordanting recommended. Strong and fast golden to lemon yellows are produced. Use at 20-50% WOF for medium shades.
TO USE: place shavings in a stocking and soak overnight (or longer) in cold water. Bring to a simmer for 1 hour, cool and remove stocking. Enter premordanted fibre and simmer for 1 hour. Combines well with other dyes such as Logwood. Shavings can be dried and reused.
Light and washfastness: excellent.