If it's not bleeding any more (or if other fabrics are not picking up the bleed), there's no need for color catchers. Color catchers are a safety precaution. If they come out clean, there is no need to use them in subsequent washings.

dylon sos colour run pulled all the red out of a finished quilt and prevented it from resetting in the whites.

i wrote a thread about it here.

aileen

Hi DJ! I just bought red fabric at JoAnn's too. I'm afraid to use it, but I'm anxious to start my new project. Well, I'm off to find my Retayne.

Good luck on your project.