Direct thermal printing utilises heat to imprint the content onto a special type of substrate with a heat-activated surface. Another type of thermal printing technique is known as thermal transfer printing, which utilises a ribbon that passes between the heating unit of the printer and the surface of the substrate. This mechanism is activated when punctual heat is applied from the heater, which causes the ribbon to melt onto the substrate, thus; forming the printed image. Both thermal printing systems are widely used across multiple industries, such as retail, logistics, and travel to name a few.