Embossing is a process that creates an impression of a design onto a surface that allows for marks to remain once the pressure is released. There are 2 typical varieties of Embossing: Blind Embossing - The design will remain the colour of the product it's being embossed on; Foil Block - Once a design is embossed it's filled with a metallic paint such as gold or silver.

Here are some debossing examples:

debossed notebook

debossed silicon wristbands