I wash all my fabrics, and use Retayne for anything I think might bleed. By the way, I was just at Joann and they were out of Retayne, so I got the Rit version. Anyone ever try that before? It was $3.99 for 8 oz. Since I was buying red fabric, I didn't want to take any chances on going completely without, but I've never tried this brand before.