Receta: Dyeing with Indigo (#36000)
The following recipe is simple, sustainable and can be made individually. After dyeing, the dye can be brought to a pH value of 6 with water and a little vinegar and poured down the drain without hesitation. The quantities are provided by the plant colourist Michael Garcia. The preparation and handling allow for flexibility, e.g. external conditions, temperature or dyeing time.
Procesamiento
Paso 1: Wash the textile to be dyed at the highest possible temperature and rinse well; keep moist.
Paso 2: "Stem vat"
The indigo is shaken well with a cup of approx. 50°C hot water in the screw-top jar and the marbles. Then pour the liquid through a sieve into the glass jar.
The indigo is shaken well with a cup of approx. 50°C hot water in the screw-top jar and the marbles. Then pour the liquid through a sieve into the glass jar.
Paso 3: Mix the calcium hydroxide with a little hot water to form a lump-free mixture with a cream-like consistency and add to the indigo solution. Always wear gloves and a mask when doing this.
Paso 4: Then dissolve the fructose in hot water and stir into the indigo-calcium hydroxide mixture.
Paso 5: Fill the three components in the glass container to a total volume of max. 1.5 litres with 50°C hot water. Stir gently to add as little oxygen as possible. Then leave to stand for 1-2 hours. Stir gently from time to time.
Paso 6: The stem vat is "ripe" when a copper lustre has developed on the surface and blue bubbles, the so-called "indigo bloom", have developed. The colour of the vat varies between yellowish green and reddish brown. If the vat is blue in colour, keep it warm for a while at 50°C in a water bath and stir in dissolved fructose if necessary. Check the pH value (ideally 10 - 12).
Paso 7: Place a small piece of textile in the vat as a sample and slowly remove it after 5 - 10 minutes. It should be green and only "turn blue" in combination with the oxygen in the air.
Paso 8: The "master vat" is now emptied with the sediment into a container (bucket or pot) with approx. 4 - 6 litres of 50°C hot water. Stir slowly and leave to rest for approx. one hour. Note the copper shimmer on the surface and the blue bubbles, the so-called "indigo bloom". The dyeing process can then begin.
Paso 9: Dyeing Slowly immerse the dyeing material in the vat; move it gently without touching the sediment.
Paso 10: First bath: After 10 - 20 minutes, slowly remove the fabric and wring it out as drip-free as possible. Then smooth out and leave to "blanch" in the air.
Paso 11: Second bath (and subsequent baths): Do not exceed a maximum duration of 5 minutes.
Paso 12: Once the desired colour result has been achieved, it is best to carry out 1 - 2 more dyeing processes, as some of the blue will still be washed out.
Paso 13: Either leave the textile unwashed to dry and then rinse well or rinse and wash immediately. Add a little vinegar (for neutralisation) to the water during the last rinse to get it out of the alkaline range.
Nota
For disposal, dilute the vat well with water and adjust to a pH value of 6 with vinegar. The liquid can then simply be disposed of down the household drain. Tip: Indigo is not soluble in water; shaking with the marbles and hot water will not cause the indigo to clump.
Kremer Pigmente no se hace responsable del resultado de aplicación de los procesos aquí descritos. En todos los casos, recomendamos la realización de pruebas previas a cualquier aplicación definitiva
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Autor: Kremer Pigmente
