I use a dye-setting product (not synthrapol) that I purchase online -- it's not expensive -- costs more to ship than the product costs per unit -- so I buy several bottles at a time, with the same shipping cost! I have no financial interest in the company that makes the product -- it's Ritz Dye Fixative and IT WORKS! I am particularly careful with full vibrant colors -- those are the ones most likely to bleed, but I check them all! It's worth the extra step and accomplishes two safety things in one operation -- if you dye-set your fabric, you're also causing it to shrink (if the fabric is prone to shrinkage), and you're also guaranteeing that your dyes will NOT bleed. Come to think of it, it also accomplishes fade prevention! JMHO!
Jeanette