How to Acid Dye Wool and Other Animal Fiber
Color Yarn and Roving for Spinning, Knitting and Crochet
Apr 4, 2009
Wool and animal fiber yarn or rovings are easy to dye using acid dyes. Acid dying is very simple and is easy to do at home using little in the way of special equipment or materials. Despite its name, acid dying is safe to undertake. The term 'acid' simply refers to the fact that the dye needs to be added to slightly acid water in order for it to become permanent. Water can be turned acid by the addition of vinegar, citric acid or even lemon juice. Vinegar is the most readily available and cost effective solution.
Acid Dyes
Acid dyes are typically sold in powdered form and this is dissolved in water prior to use. Acid dyes are available in a wide spectrum of colors. They are, however, also simple to mix to create additional colors. The density of the die will also effect the finished color. Light pastel colors, for instance, are created by using a smaller amount of dye.
In order for the dye to take and to give permanent results the dye solution and the wool or other animal fiber needs to be heated until it is boiling and then left to simmer for between 30 minutes and an hour. If the correct proportion of dye to wool has been used, the water will be almost clear when the process has finished. This is because the wool has absorbed all of the dye particles.
Note: The important proportions are the proportion of dye to the weight of wool. The amount of water does not matter as the water is simply dispersing the dye.
Equipment Required
Most of the equipment required can be found around the house:
- Dye pot – any stainless steel pan will be fine. A large saucepan that is no longer used for cooking will be perfect.
- Spoon for stirring
- Pyrex or similar jug for mixing the dye and measuring water
- Kitchen scales
- Materials
- Wool or other animal fibers. These should be prepared and clean (this means that fleece should be scoured)
- Dye as required
- Vinegar – white vinegar is perfect, however brown vinegar will work with darker colors.
How to Dye with Acid Dyes
These are the basic steps of the acid dyeing process. This is not a precise art, however,and many dyers develop their own techniques and procedures.
- Weigh the dry wool or other animal fibers before starting
- Soak the clean wool or other animal fibers well first to ensure that they are completely saturated. Leave them overnight if required.
- Mix the required amount of die powder with a little water. Between 1 and 2 grams of dye powder is generally enough to dye 100 grams of fiber, however check the manufacturers instructions before starting.
- Add the dye solution to the dye pot and stir in the vinegar. Again, refer to the manufacturers instructions however generally allow 50ml per 100 grams of wool.
- Add the wet wool and top up with water if required. The wool should be completely immersed in the dye solution.
- Slowly heat the water until it is boiling and then leave it to simmer for between 30 minutes to an hour. Make sure that there is plenty of water in the dye pot.
- Allow the dye to cool to room temperature.
- Carefully remove the wool, rinse it well and either leave to dry or put in a spin dryer to dry. DO NOT put the wool in a tumble dryer as it will felt (it is fine to use a spin dryer as the centrifugal force stops the wool from agitating and therefore felting).
Tips for Using Acid Dyes
Here are some tips to help the successful use of acid dyes and to aid the dye process:
- Unused dye solution can be used at a later date. Simply store in an airtight container and reheat when required.
- Do not agitate the wool or fibers overly when heating the dye as this can cause them to felt.
- Do not add cold water or take the wool from hot water and place it in to cold water as again, this will cause it to felt.
