I have no clue, except what dunster mentioned--that the giver never finds out from the recipient that colors ran when they washed a gift quilt.
I once asked a LQS owner how she always sewed the store samples and even her personal quilts without ever washing first but never had a problem. I would be scared silly to make a whole quilt . She said she doesn't have time to wash and iron fabric for the store samples (I understand that but still cringe), and if she were to wash them she'd used color catchers. But once a color like red bleeds onto white , color catchers aren't gonna catch the excess. I just scratch my head at the phrase 'I've never had a problem." I wonder if the person has used any color darker than beige. ?