Disperse dyes can be used with various techniques and will readily colour synthetics such as polyester, nylon, cellulose acetate, vilene, viscose, synthetic velvets and PVC. The dye can also be used to colour plastic buttons and fastenings. Hot Water Dye: 85ºC for Acetate and 95-100ºC for other synthetics.
Their effect is less potent on polyester, due to the molecular structure, allowing only pastel through to medium shades at boiling temperature 100ºC; the temperature needs to exceed 100ºC to achieve a greater depth of colour. Boiling water cannot increase beyond 100°C at normal pressure, using high pressure (as in a pressure cooker at which water boils at 121°C) will help to produce the required results. Full colour can be achieved when transfer printing with the dyes (see our blog post Disperse Dyes for Dyeing and Printing for further information).
Disperse dye particles have a tendency to stick together when boiled for a long period. Add a small quantity of Dispersing Agent WS powder to the dye bath to help prevent specks forming on the fabric.
It is recommended to use spectacles, gloves, dust mask and an apron when handling dyes and chemicals.
