The first embroideried quilt I made was Simon's Folly, and I thought I had to follow the book, so the book said to use either calico or muslin for the blocks. So, I thought that calico would take away from the embroidery so I bought 200 TC muslin for the blocks and cheaper wide muslin for the back. I will never do that again, the cheap muslin stretched as I was trying to quilt it, so I ended up taking the quilting out and re-washing the backing in very hot water and drying on the highest dryer temp. Then I re-did the quilting. As an end result, I now have some waving in the center block. This is the quilt that took me 3 years to figure out how to re-hoop and get everything lined up just perfect. Some time later I found out that in Aus. the terms used for cotton is calico or muslin. I'll attach a couple of pic's so you can see what I'm talking about.
Hugs, Gail