Crocking-

The transfer of dye from processed fiber onto other surfaces. This typically occurs most with indigo dye. Crocking is less prominent with cellulose fibers like linen and hemp, and more prominent protein fibers like wool.

Care

Fabric:

Most crocking is taken care of after the first wash. We advise washing alone or with like colors before wearing an indigo dyed garment. Soak in warm water with ¼ cup of white vinegar for 40-60 minutes, then wash with cold water, or optionally with your favorite eco friendly soap. 

Yarn:

Indigo dyed yarn will turn your hands blue while knitting. The mechanical action of knitting is enough to work the last bits of indigo out of the fiber. After knitting a piece, soak it in warm water with ¼ cup of vinegar for 40-60 minutes, then rinse with cold water. This can also be done to a loose skein before knitting.