I used retayne twice on some bright red fabric I had then washed it twice with color catchers just to make sure. The retayne really worked well but the 1 color catcher did turn a tad pink. But the second was white. I bought mine at Amazon.

I have found washing with salt sets red fabrics.....

Please see post #32 on the following thread regarding Kona Cotton.
http://www.quiltingboard.com/main-f1...cs-t33854.html

Thank you for all the useful information.