Simply drop the dye packet into a washing machine with your denim and run on the hottest cycle! No-mess coloring powder is great for breathing new life into faded denim again or simply to add more color to your existing wardrobe. Works on any natural fabric including denim cotton linen silk hemp etc. Use in front or top loading washers. Permanent long lasting colors and no additional chemicals are needed. A single packet will dye 1-2 pairs of jeans. Full color will be most apparent on lighter fabric while more subtle color will appear on darker fabric. Yellow dye.