An essential and reliable tool for hand dyeing with dyes such as acid dyes, disperse dyes, indigo, and some natural dyes. This 305 mm long lab thermometer allows you to accurately monitor solution temperatures when working with these dye types. Featuring a white background with red spirit for clear, easy reading, it measures temperatures from −10 °C to 110 °C.
Why is temperature important when dyeing with Indigo?
Heat plays an important role in indigo dyeing, as it helps speed up chemical reactions, supports bacterial activity in fermented vats, and allows the dye to penetrate fibres more effectively. Although indigo can be used at lower temperatures, warmer conditions—typically between 20°C and 50°C (68°F–122°F)—are generally preferred for quicker, more reliable results.
Why is temperature important when dyeing with Acid dyes?
Heat enables the dye molecules to bond fully with protein fibres such as wool and silk, as well as nylon, producing permanent, wash-fast colour. Without adequate heat (typically achieved through simmering or steaming) the dye will not fix properly and colours may wash out. The process takes place in an acidic dye bath, often using vinegar (hence the name of the dye), with heat speeding up dye absorption and ensuring good fixation. Care should be taken not to boil delicate fibres such as silk, as excessive heat can dull their natural lustre.
