1. Weigh dry items to ensure that they are 2.5kg or less. If you need to treat more than 2.5kg of fabric, do so with two or more machine loads.
  2. Pour the contents of the sachet into the washing machine drum.
  3. Put fabric in the washing machine. Set and start the longest/hottest programme (85ºC/95ºC).
  4. When cycle is complete, add usual washing detergent, wash fabric as usual and then dye to the colour of your choice.