Let's find out what material the thermal CTP plate is made of. The heat-sensitive ctp plate is thermally decomposed/polymerized and imaged by the photosensitive resin in the photosensitive material under the irradiation of infrared light. The light source of the heat-sensitive plate is infrared light of about 830nm, and infrared light is accompanied by heat.
Thermosensitive imaging material is a concept that covers a wide range. The well-known thermosensitive recording paper has long been used in computers, fax machines, and thermal printers supporting various instruments and meters to record the output—graphic information. The basic principle of imaging of thermosensitive recording paper is that thermosensitive paper undergoes thermal-induced color development or discoloration under a hot needle's action so that text or images are recorded on thermal recording paper.
Thermal imaging materials for CTP plates appeared relatively late. The thermal composition is coated on the metal aluminum plate base in advance, and the scanned part is sensitive to heat through near-infrared laser scanning. The photothermal conversion substance in the composition (generally called infrared Absorbing dyes) converts light energy into heat energy, causing the part to heat up, and causing some physical and chemical changes. Its solubility properties, adhesion properties, and hydrophilic and lipophilic properties have significant changes, and even burning occurs in some cases. Corrosion and gasification phenomenon, and then after developer treatment or without developer treatment (commonly known as free processing), text or images are obtained on the plate. Because this technology is both cutting-edge and forward-looking in the printing industry, it has achieved unexpected rapid development in just ten years. Today, thermal CTP technology occupies an overwhelming advantage over all kinds of CTP technologies in terms of plate consumption and plate-making equipment installed capacity and has become the mainstream and development direction of CTP technology. It can be seen from the published articles and patents that the research on heat-sensitive CTP plates has attracted many scientific and technical personnel in the world, and new materials that can be used are constantly emerging.