best to put your strips into a mesh bag and pre-wash with a color-catcher...i used that same jelly roll...the blacks did not run...one (or more) of the browns did however. at least swish them in water at the sink and see if you find the culprit. i used them in a king size quilt that now has brown/tan streaks of color on the cream colored back... tried re-washing with the color catcher...too late...haven't figured out any remedy yet