This unit, a Czech Polly-725, is a four-color two-color offset press that has been printing in color, and the most recently printed jobs are often 80g/m2 coated paper or 250g/m2 whiteboard paper, resulting in printing paper especially large ink. When the amount is taken, the collection of the collection teeth is not effective. The second group often rolls the blanket, and sometimes the blanket is rolled out of a deep pit. The blanket reducing agent cannot be reduced at all. If the rubber blanket is scrapped, it will not only increase the cost but also delay the production.
Because this unit is printing on color, there are many types of screens. If the blanket is used, if the mat is not good, the color around the depression will be deepened, which will affect the quality of the product. The method of baking a blanket with a lighter was tried, but it took a long time and the effect was not satisfactory. Later, according to the principle of thermal expansion of the blanket, found a solution to the problem of using electricity to solve the problem. Remove the blanket first and place it on the flat top of the table with the backside facing up, then heat the iron until the temperature rises (raise the temperature of the iron as much as possible) and place the iron flat on the blanket. Slow heating, pay attention to the electric iron to move back and forth to prevent the foam blisters, at the same time look up the blanket overturn until the depression flattened so far. Finally, iron the entire blanket and restore the small pits and the parts that are often under pressure. After the blanket is cooled, the printing is reinstalled and the effect is quite good.
Doing so can not only achieve the effect of reduction, re-use the scrapped blanket, but also save a lot of blanket reductant, and the blanket can be repeatedly restored after rolling out the pit again.
Source: Printing Technology