I purchased a Jelly Roll that was dark red, brown, teal and cream. I was raised pre washing for shrinkage, and with the dark colors afraid of the bleeding. I washed them in net bags on gentle and dried. I had, wait I still have a disaster on my hands. NEVER AGAIN WILL I BUY JELLY ROLLS
My nice precut strips now measure 2 1/4 and I cut my background fabric strips after I washed it at the correct 2 1/2. I am now sewing the two together, then trimming both to 2 1/4 due to the frayed Jelly Rolls. If I didn't have over $100 invested in background fabric, and backing I would have tossed the whole project.