As we all know, in the process of printing prepress plates, we often encounter some problems with different lengths of film, resulting in overprinting. The reason is that due to the large temperature difference between environments, the production time is not at the same stage. Output time error as well as machine equipment, and caused by different materials. Under normal circumstances, our approach is to cut the film, use the film base to adjust the manual make-up, encounter the entire network, we can do nothing, only re-output, that is, waste and delay how to better solve this The question, after my own exploration and experimentation, summed up a set of warm-baking methods.
The method of warm roasting is to use the principle of hot rising and shrinking, so that the film shrinks back when it is heated and cooled.
First, the long film is sandwiched on both sides with a white cardboard (thickness between 0.3 and 0.5) and baked in an oven. The temperature is determined according to the length of the error, generally between 30°C and 80°C. The low temperature is low, and vice versa. During the baking process, the film is heated evenly and several times. It not only adjusts the temperature, but also keeps the film close to overprinting. Must not eat a fat person, with this method can be a maximum of 1 meter long film retracted back to 0.5mm, generally able to meet our needs for printing requirements, this method is currently more skilled in our company's application. The effect is good. Greatly improved the speed of our plate making.