Hand Dyed Yarns are unique - they reflect each dyers’ processes and artisanal techniques that create an artistic interpretation or colour way - every dyer develops their own methods specific to them, giving their work a signature, it is truly an artistic endeavour.
- environmental factors play a part; the natural acidity of the local water ie in London where I’m located the water is ‘hard’, meaning it contains high levels of minerals such as calcium and magnesium carbonates giving our local water a higher alkaline PH value, this will have an impact on how the dye bonds to the fibre and more acid (vinegar or citric) is needed.
- products used - there are various types of dyes and pigments, natural or manufactured dyes. You need to also consider the type of fibre to be dyed; is it protein or plant based - eg Wool, silk, yak, alpaca are all protein fibres and linen, cotton, bamboo are plant fibres and need a different type of dye molecule that will bond with either the protein or plant fibre.
- water temperature during the dyeing process; fixers and mordants used ie - vinegar, citric acid to create an acidic medium to fix the dye to the fibre. Salts are know as levellers that achieve more even dyeing. Natural dyes use many chemical fixers & mordants also as natural pigments are less strongly adhering, less light and wash fast than say a commercially produced pigment.
This type of yarn is commonly “put-up” in skeins, or hanks to make it easier for the dyer to apply dye comprehensively. This way, you can see more of the yarn and the colour distribution and hopefully get a better idea of what it might look like when knitted. Most if not all hand dyed yarn is dyed and supplied in small dye lots or batches, I personally dye my skeins in batches of 6, 12 or 18 etc.
There are many other dyeing methods, low immersion, steaming, micro-waving etc.