FastColours LLP How to Dye Wool Nylon & Silk Fibres
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MOST IMPORTANT

Please note that FastColours do not give any guarantee on the quality and performance of the dyeing achieved as the process is outside the control of the company.  It is the responsibility of the purchaser to ensure that they understand the risks involved in carrying out this process and that FastColours do not have any subsequent liability.  Please contact the company if in doubt.
Dyeing is reasonably straight forward.   The following is a general guide line of how to dye these fibres.  Remember to protect yourself with gloves, goggles, appropriate clothing etc. as this process is done at a high temperature involving dyes and chemicals.
PLEASE READ THE MSDS THAT ACCOMPANIES THE PRODUCT BEFORE STARTING
If you are not sure, please contact the company for additional advice.
DYE PREPARATION (applicable for all fibres)
  1. Weigh the fabric to be dyed.
  2. The amount dye needed is a percentage of the weight of fabric/article.  For light shades you would need about 0.5%, medium shades 1 to 2% and for darker shades 3% or more. 
  3. Weigh the dye out.
a) Make a paste using cold water
b) Add hot water to this paste whilst stirring
c) Continue to stir until the dye is dissolved
d) Allow to cool
e) The dye is now ready to use
DYEING OF WOOL, NYLON (POLYAMIDE) & SILK.
  1. The dyebath needs to be acidic.  Use 1 ml/l of Acetic Acid 80% (If not available, use spirit (clear) vinegar 15 ml/l instead)
  2. Add the Acetic Acid and Dye to the dyebath.  Mix well
  3. Raise the temperature to 40°C.
  4. Add the fabric/article to the dyebath
  5. Raise the temperature to 95°C (Silk 85°C) over about 15 – 20 minutes.  Circulate the dye liquor gently if possible.
  6. Hold at 95°C (Silk 85°C) over about 15 – 30 minutes.  Circulate the dye liquor gently if possible.
  7. Cool to 70°C. Circulate the dye liquor gently if possible.
  8. Drain
  9. Give a warm rinse with water for 8-10 minutes. Circulate the rinse liquor gently..
  10. Dry