Red powder that turns black when mixed with water. Removes light rust and turns traps a dark black color. Works as well as black dye and is considerably cheaper. Instructions: In a container large enough to cover the amount of traps you would like to treat per time, add 1 pound of dye to each 5 gallons of boiling water and simmer for 1 hours. Add water as needed to keep traps completely covered. Remove traps, rinse with water, and hang to dry. Can be used on all steel traps. One pound will do 25 to 30 traps.