Sandstone Nakoma Rit liquid Dyemore is ideal for dyeing synthetic fabric blends with more than 35% polyester, acrylic, acetate or nylon. (if less than 35% synthetic use Rit All purpose dye. Due to the complexity of dyeing synthetic fabrics, you must use this liquid dye in a stainless-steel pot on your stove top to maintain a high-water temperature throughout the duration of dyeing. Cannot be used in a washing machine. Rit dyemore dyes dyeing synthetic liquid fabrics.