Recycling of the old film base

In the daily make-up, the commonly used film base is mostly a new film base. However, the printing industry is increasingly fiercely competitive. Each printing company starts from saving raw materials, and the imposition process is no exception. The old film base is often used repeatedly. On the film base, inadvertently sticking a lot of dirt, especially the residues left by the adhesive tape in summer brings a headache to the operators. If the processing is not good, the photosensitive layer will be prevented from being fully exposed during the printing, and sometimes it will adhere to the bottom of the glass plate on the upper frame of the printing machine, and a lot of dust will be attached, which will affect the full exposure of the photosensitive layer at the next printing. If it is a non-graphic area, it can be treated with a degreasing agent. If it is a graphic part, it is a troublesome thing. If it is an awkward situation, it is necessary to wipe away the residue left by the adhesive tape (the residue is not To prevent the full exposure of the photosensitive layer, it is anti-adhesion to the surface of the PS plate). Repeatedly rubbing with the finger and then rubbing the developer requires multiple rubs to re-develop the photosensitive layer covered by the residue. Renovation knife to repair or scrap the entire plate. To prevent similar situations, there are two main methods that can be used:

(1) Within the scope permitted by the conditions, use a soft cloth to rub the alcohol to clean the dirt on the film base. Because the alcohol is purer and contains a certain amount of moisture, the dirt is easily wiped off after absorbing water. In addition, the alcohol is volatilized. Faster, the film base can be used soon after dirty;

(2) Careful attention should be paid to the base of the film. The ones that can be processed at that time are never left to be dealt with later. If the uncovered film base is temporarily not used, it should be packed in a paper bag to prevent contact with dirt to protect the film base. , convenient for next time use.