Testing fabric for cotton/blends - Remnants from shirt factory find
Well, yesterday my DH and I went new truck shopping down on the Delmarva Peninsula, with other destinations at some nice thrift stores. I found a box of vintage 1970's shirt remnants from the shirt factories that dotted Delaware and Maryland years ago. I need some information on how to tell if these are 100% cotton, or a high cotton blend. How does everybody test for 100% cotton when it is not marked anywhere? I am thinking that it would be okay to make simple square block donation quilts out of these remnants if they are cotton blends, would that be okay, always heard that the "quilt police and lightning" would happen if I didn't use 100% cotton. Am looking for guidance. Thank you all.