I'm afraid I belong to the wash it before you use it club. I will add fabric to my laundry to wash and if I don't have a full load, I wash and rinse the fabric in the sink. I've been surprised when some of the darker fabrics did not bleed, but there was one medium green that I had to wash out 3-4 times because it bled so much and it was from a LQS, so you never know.