Our dyed fibers and fabrics are colorfast and lightfast based on industry standards in that they will not fade over time or when washed. However, please note that particularly dark/saturated colors such as deep reds, teals, etc. may still discharge a bit of residual dye not removed during this rinsing process. We recommend pre-washing these colors before embarking on your project, or not washing. We do our best to discharge unbonded dye from our fabrics and fibers, but we cannot guarantee it.