These concentrated, powdered, hot water dyes are the best dyes available for silk, wool, cashmere, alpaca, feathers, and nylon. Extremely brilliant and colorfast, these dyes are very easy to use and produce a uniform dye job. A half ounce bottle will color up to two pounds of fibre depending on the depth of shade. Warning:may irritate skin or eyes. Avoid eye contact, wear rubber gloves and a suitable dust mask. Avoid dust.