You know the large plastic template material that you cut into shapes? Is it heat proof? I have found one of my teflon-like applique sheets but I want another to go on top and under the ironing board. Would parchment paper work? I, of course, want it now and all stores are closed. Just thought I'd ask to see if someone has another solution. I do not want to ruin an iron trying to find out! Thanks for any help