I just finished making 3 quilts. Blocks were all made before 1981 and found only 16 years ago. I carefully washed and nothing changed. Had to square blocks the best I could then design quilt & washed ready to use. Owner was thrilled and all went better than expected. My recommendation is to do the best you can and they will be appreciated for what they are. Got the photo's from camera but can't post for an unknown reason.