Jacquard Acid Dye is suitable for: Feathers • Silk • Wool • Cashmere • Alpaca • Some Nylon Materials Jacquard Acid Dyes are highly concentrated powdered dyes designed to produce brilliant, vibrant, and long-lasting color on feathers and other protein fibers. These professional-quality hot water dyes provide rich, transparent color with excellent colorfastness and even coverage. When used for immersion dyeing, Jacquard Acid Dyes penetrate fibers exceptionally well and produce strong, uniform color. They are an excellent choice for dyeing feathers, whether you're coloring feathers for crafts, costumes, millinery, fly tying, floral arrangements, fashion accessories, or other creative projects. Despite the name, acid dyes do not contain harsh acid. The "acid" refers to the white vinegar or citric acid added to the dye bath to help the color bond properly to the material. PRODUCT DETAILS Size: 0.5 oz / 14 g bottle One 0.5 oz bottle can dye up to approximately 2 lbs. / 0.91 kg of feathers, depending on the desired depth and intensity of color. Highly concentrated powdered dye Produces bright, rich, transparent colors Excellent color penetration and colorfastness Ideal for immersion dyeing Can also be used for painting and printing applications with steam setting For feather artists and crafters, these dyes are especially useful for creating custom-colored craft feathers, costume feathers, millinery feathers, fly tying feathers, jewelry feathers, and decorative feathers. PLEASE NOTE : When purchasing larger quantities, the dye may be packaged in one or several larger containers rather than multiple individual 0.5 oz bottles. The total amount of dye purchased will remain the same. Actual dye results may vary depending on the material, dye concentration, water temperature, dyeing method, and desired color intensity.