What should be the temperature of the dye when you dip the fabric? Does the temperature have to be the same for all fabrics and all dyes?
The dye solution should be warm when dipping the fabric. The chapter recommends dipping tied fabric in warm dye solution for 20-30 minutes. Heating increases the solubility of dye in water, speeds up the dyeing process, and helps fix the dye to the fabric. However, some dyes and processes require no or minimal heating - cold water dyes use chemicals to fix the dye instead of heat, and passive heating uses solar energy over several days. The temperature may vary depending on the fabric and dye type.
Explanation
The chapter explains that heating plays an important role in dyeing by increasing solubility, speeding up the process, and helping fix the dye. However, there are alternatives: passive heating using solar energy takes several days to weeks, and cold water dyes use chemicals instead of heat. The standard process uses warm dye solution.