Characteristics of thermal CTP plates
HENAN HUIDA PRINT ALL TECHNOLOGY CO., LTD
Professional Printing Plate Manufacturer
Thermal CTP mainly uses thermal imaging technology, relying on the printing plate material to absorb heat and change the state of the material, thereby achieving changes in material properties.
Plate composition The thermal decomposition plate is composed of a heat-sensitive coating and a hydrophilic plate base. The heat-sensitive coating is generally composed of a water-insoluble (alkali) film-forming resin and an infrared dye; the hydrophilic base can be an aluminum base.
Imaging principle The function of the infrared dye is to effectively absorb the light energy of the infrared laser and convert the absorbed light energy into heat energy, so that the temperature of the heat-sensitive coating can reach a level that weakens the chemical bonds of the film-forming resin on the surface of the plate and decomposes, thereby making the heat-sensitive coating The coating is water (alkali) soluble. The heat-sensitive coating in the light-exposed area undergoes a decomposition reaction under the action of heat and is alkali-soluble. It is dissolved during the development process, exposing the hydrophilic plate base and becoming a hydrophilic blank part; the heat-sensitive coating in the non-light-exposed area does not. A decomposition reaction occurs and it is not alkali-soluble. It remains on the page and becomes a lipophilic graphic part after development.