The Layering Method
This Pride Month Rainbow Flag Shirt was made by the simple layering method. It sounds simple but there is a downside for doing it this way. It makes the vinyl a little thick and takes much more pressure.
Some vinyl does not take well to layering. Glitter vinyl, of either HTV or regular vinyl, must be the top layer and even then, it doesn’t work great. I have only worked with adhesive foil in layers once or twice and it works fine, but it is very unforgiving of mistakes.
The next problem is you are limited to two maybe three layers. This project uses lots of colors but nowhere is it thicker than two layers. The pressure you need to apply HTV gets to be more with each layer. And with either type of vinyl it gets bulky and tends to not stick well.
Remember to cover the whole project with parchment paper or some other barrier when layering HTV so you don’t burn or pull up lower layers.