Foil stamping, typically a commercial print process, is the application of pigment or metallic foil, often gold or silver , but can also be various patterns or what is known as pastel foil which is a flat opaque color or white special film-backed material, to paper where a heated die is stamped onto the foil, making it adhere to the surface leaving the design of the die on the paper. Foil stamping can be combined with embossing to create a more striking 3D image.
Here are some examples of foil stamping or blocking used in real life production. I have found these images from the same website i found the screen print examples, they are designed by a company called DRY. I'm really glad that I have stumbled across their site as I love their work and will be following what they produce.