The basics Rit ProLine Powder dyes are made with reliable high-quality control standards. The benefits Dyes can be mixed to create endless color possibilities. Rit website has color formulas! The pro tip One pound powder bag will dye 16 lbs of fabric; approximately 48 yds of substrate. The uses Specially formulated to permanently color a range of materials including cotton, linen, silk, wool, wood, wicker and more. The bottom line Available in 1 lb and 5 lb sizes, in a re-closable bag. Not all colors are available in all sizes.