Jacquard Acid Dyes are highly concentrated, powdered dyes for use in hot water. The "acid" part of the dying process is simply White Vinegar or Citric Acid. These are for use with hot water and create beautiful deep colors. Lighter colors can be achieved by using less dye.

These dyes are for use with wool and other protein fibers such as silk, including silk chiffon and silk fabrics, yarns, cashmere, alpaca, feathers and even some nylons. The Jacquard Acid dyes may also be used for painting or printing applications, using steam "setting" of the dye.