Thermal printing is a digital printing process, which is used to produce a printed image by selectively heating thermal paper when the paper passes over the thermal print head. There are two types of printing technologies namely thermal transfer and direct thermal transfer. Both methods use a thermal print head that applies heat to the surface being marked. Moreover, thermal transform printing uses a heat-sensitive ribbon instead of heat-sensitive paper, in order to produce long-lasting, durable prints. Thermal printing is predominantly used for labeling shipping products and for recording live rhythm strips on hospital cardiac monitors.