Classification Of CTP Plate
CTP Plate-making technology is divided into: photosensitive CTP Plate-making technology and thermal CTP plate-making technology. wherein the PHOTOSENSITIVE system CTP plate includes silver salt diffusion-type plate, high sensitivity resin plate and silver salt/ps version of composite plate; the thermal system CTP plate includes hot crosslinking plate, thermal ablation plate and heat transfer plate.CTP Plate
In a broad sense, refers to plates in the direct plate-making equipment exposure imaging, do not need any subsequent processing process, can be on machine printing, of course, no need for chemical development, flushing, and so on, is the true meaning of the free processing plate; In a narrow sense, refers to the plate in the direct plate-making machine after exposure imaging does not need chemical development treatment, but there will still be individual non-chemical treatment processes, such as plate ablation scrap removal, coating protection and other processing work.CTP Plate
Hot-ablation plate, polarity conversion technology plate and hot-melt technology plate. The hot-ablation plate is usually double coated, the bottom is lipophilic layer, and the upper layer is hydrophilic. When exposed, the laser energy will burn the hydrophilic layer, exposing the pro-holdout, form and text; The unexposed part still retains the hydrophilic quality, for the layout blank. The thermal ablation technology is not smooth in practical application, mainly because the dust and debris produced after ablation will affect the accuracy of the optical components of the plate making machine, and is disadvantageous to health and environment. Furthermore, The blank part of the heat-ablation plate is hydrophilic coating, and its ink balance control ability and resistance to printing are less than the traditional PS plate and CTP plate.
The use of polarity conversion technology of the free treatment plate for single-layer coating, its drug membrane layer is hydrophilic (or lipophilic), after exposure, the drug membrane layer polarity changes, change to lipophilic (or hydrophilic), the exposure part is the graphic (or blank) part of the plate. This type of plate after exposure does not need any treatment can be directly on the machine printing. However, because of its printing control and resist printing force is not ideal, therefore, from the large-scale commercial application is still a distance.CTP Plate