Originally Posted by Holice
I was in a shop last week and the owner showed me how to test the fabric before buying.
Take a white piece of paper and rub it over the fabric. If color comes off, means it will bleed and need prewashing.
I wouldn't rely on that as the only test! If it does that yes, you've a got a problem on your hands. Though it may not do that ... it can still be a bleeder.