Interesting Bleeding Problem

Recently posted on one of the lulu boards - A Ray Cool Racerback (ray is a bleeder, unfortunately) with Senorita Pink bra underneath. Senorita hasn't been out for at least three years and wasn't a known bleeder. (I have a Senorita Scoop Neck tank and haven't had a problem) The general thought, and I agree, is that the Ray item pulled the color out of the other item. Maybe whatever lulu treats the fabric/thread with to enhance wicking? Anyone have a chemical background that can comment?