You can use it for anything you like, and most people will think it's just wonderful. I guess the quilt police won't raise any objections if you don't enter it in a show. For me the main problem with the blend would be that I tend to iron all my quilt fabrics with the iron set on "cotton", and usually if I hit some old thing from the stash that isn't all cotton I will find out immediately because it melts at that temperature. It will pull up smaller the second the iron hits it, and I can't be bothered with that, so will either donate it or use it for non-quilt purposes. I have always loved checks and wish I knew of a source of all cotton gingham in a rainbow of colors.