ABSTRACT
All modern printing technologies are non-impact, where, as the name suggests, there is no contact between paper and printer head. The physical and chemical properties of the printing media play a significant role in the quality of the printed image as well as the device characteristics. Continuous inkjet printers are used mainly for industrial applications. The ink used for piezo-electric printers is liquid and the droplets produced can be as small as approximately 11.5 picolitres. Thermography, printing using application of heat, is divided into two categories: direct thermography and transfer thermography. The printing speed is slower with thermal transfer printers compared to electrophotographic and inkjet printers. Because the dyes are spread through the coating, the image has very smooth continuous tones. The properties of the equipment and materials used for digital printing introduce several factors that can have an effect on the quality of the final prints.
