I had a weird thing happen with using vinegar this weekend. I had washed a quilt that I had just finished and the red in it bled and the color catcher didn't catch it all and it bled on the light fabric. I had pre-washed twice before using and thought the bleeding had stopped. It did not rub off on white or anything else. Anyway I soaked it in hot water, cold water, over and over, still bleeding. Then I poured vinegar into the cold water and the color released and turned it all a deep rust color. It was only about the size of a fat quarter so I was glad to throw it out especially since it had bled on my quilt. It was a Henry Glass fabric. Does anyone know what might have caused the vinegar to release the dye like that?