How to remove dirt from the film used for imposition

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 the occurrence of similar situations, there are mainly two methods that can be used: (1) Within the scope of conditions, use a soft cloth to rub the alcohol to clean the dirt on the film base, because the alcohol is pure and contains A certain amount of moisture, dirt easily wiped after absorbing water, in addition, alcohol volatilization is also faster, in addition to dirty, the film base can be used soon; (2) when exposing the film base as careful as possible, can not be left at that time to deal with To be handled later, if a good film base is not used temporarily, it should be packed in a paper bag to avoid contact with dirt to protect the film base and facilitate the next use.