As a general rule, you never want your heat surface (usually an EasyPress) to touch your heat transfer vinyl directly. That's why you cut out your images in reverse and place them face down when you use HTV. If you are creating a project with two layers, you will need to use a pressing sheet when you are adding the second layer if any of your 1st layers of vinyl is exposed. You'll also want to use a Teflon sheet when you are adhering HTV to surfaces that may melt if they come in direct contact with the surface of your EasyPress.