To restore the lost color to a garment

Take one pound of crushed weyd ashes and pour four mass of water thereon. Let it stand a night, and then pour off the lye and take two ox galls and a handful of dried birch leaves, mix them together in the lye and let it boil together a half hour or until the leaves sink to the bottom. Let it cool; then, whichever color you would restore, add wool shearings dyed that color to the lye and boil it again and let it stand fourteen days or longer. The lye will take the color from the wool. Then pour it off and wash the cloth therein that you wish to renew. In this way the color returns again to the cloth.

Citation Type  Fabric Dye Recipe
Citation Year 1532