Indigo Fructose Dye Vat

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Kraftkolour Pty Ltd Factory 2, 99 Heyington Ave THOMASTOWN Vic 3074 Tel: 1300 720 493 Web: Kraftkolour.net.au Indigo Fructose Dye Vat The fructose indigo vat was developed by Michel Garcia. The addition of the fructose sugar acts as a reducing agent to the Indigo. The sugar removes one of the oxygen molecules from the indigo making it soluble in water. The addition of the Calcium Hydroxide (slaked or hydrated lime) changes the pH from an acid to a base. The proper pH to get good colour on wool should be about +9 and for cotton and cellulose +10. When the yarn or fabric is dipped into the indigo dye vat, it turns a green colour. When the yarn is raised into the air, the oxygen molecules from the air, bind with the indigo and turn the green into blue. To get darker and more intense blues, the yarn needs to be dipped into the indigo vat and raised into the air to oxidize several times. The colour builds up onto the yarn or cloth in layers. Keep dipping and airing out the yarn until the desired level of colour is achieved. An Indigo vat can be re-used and kept alive for several weeks until all of the indigo has been exhausted. If the Vat still has indigo but has turned blue, reheat the Vat to 50 deg C. Check the pH. Add about a teaspoon of fructose crystals and wait 15-30 minutes. The Vat should turn green. If it is still blue add some Calcium Hydroxide. pH should be +9 for wool, or +10 for cellulose. The Fructose Indigo Vat uses a 1-2-3 ratio of substances. 1 part Indigo 2 parts Calcium Hydroxide 3 parts Fructose The information above has been sourced from: ALL FIBER ARTS - https://www.allfiberarts.com/2017/indigo-fructose-dye-vat.htm More information: https://botanicalcolors.com/2013/02/09/make-an-easy-organic-indigo-vat/ .

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