Some colors will bleed regardless of where they come from and re-heating/re-melting seems to be the trigger for the problem. Canada Blue, Purples can be bad. I try to use any batch of clearer or colorless plastic in one session with only one re-heat. If I have a lot of baits to make using clear plastic containing either blue or purple I make smaller batches that get used quickly and re-heat one time. Since I use a ton of purple plastic, once a clear using blue or purple glitter has been used as far as it can go I just add purple colorant to it and continue using it because the bleeding won't matter. Also, add the glitter AFTER the plastic has been cooked to the 350 degree conversion temperature and you'll be a lot happier. I've tried a million different purple and blue glitters and they all bleed even though they are sold as a non-bleeding glitter.