Elastic for masks is hard to come by. I’d like to use up my cotton fabric stash making masks for our local children’s hospital, but I have no 1/8” elastic. None. Nada. But I do have 1” elastic, and JoAnn’s fabric website has a useful video on how to cut wider elastic into smaller strips. So I tried it. THEY DON’T UNRAVEL. What?!? How? Well, the how will have to wait until later, I have elastic straps to make. I do seal the short ends of the elastic by melting with a flame (just a little, just to melt the fibers, not to burn). Then I use sharp scissors to cut down the channel between the elastic ridges. I do not need to seal the long edges of the elastic. As long as I cut in the valleys and don’t accidentally cut across a ridge, the new smaller strip does not unravel. I pulled on it, hard, ran it back and forth between my fingers, and all the fibers stayed in place. Wow. Neat. Ok. Onto production!