Originally Posted by
AndysC
T I have a bunch of fabric from various places
I stopped prewashing ages ago and throw both types in together all the time without hesitation.
However, setting aside the issues of possible shrinkage or bleeding, I might prewash material
if I didn't get know or had doubts about exactly where it was coming from (eBay, estate sale, older fabric) and would be more concerned about issues related to pets/smoking/bugs.