May 17, 2022 - 01:01 PM
Probably not. You'd need to use a spray adhesive like Sulky KK 2000 Temporary Spray Adhesive to adhere it to the mylar to make it behave. My experience has been that the spray does not dissipate because the mylar is not porous like fabric is.
If you're using mylar for machine embroidery, it's usually just rough-cut and then trimmed like an applique fabric at some point.
You did mention for a collage on paper. I'm not sure what that means. But if you're going to adhere the mylar to the paper, you could just spray the "wrong" side of the mylar and adhere it to the paper until you do something permanent (like stitch) to hold it in place. If you want to discuss this further, feel free to contact me at email@example.com.