Thermography is a printing process which relies on heat applied to create raised, clear, glossy finish. It is a practical alternative to achieve a raised effect similar to engraving and embossing. Thermography is usually observed as an engaging and ideal printing process that adds prestige to any printed piece. This refers to two types of printing, both of which rely on heat to create the letters or images on a sheet of paper. The simplest type is where the paper has been coated with a material that changes colour on heating.