1. Film negatives should not have problems such as trachoma or scratches. When placing, the film surface should be facing upwards and should not rub against other objects. When copying, the film surface should be operated on. After use, it should be promptly placed in a suitable film bag for storage.

　　2. When aligning, the film should be facing the board. When taking the film, use both hands to pick it up diagonally and avoid touching other objects to avoid scratching the film surface. When each film reaches a certain number of boards, stop aligning and have a dedicated person inspect or replace it. After use, put it in a suitable film bag for storage.

　　3. Operators are not allowed to wear any decorations such as rings, bracelets, etc. on their hands. Nails should be regularly trimmed and kept smooth, and no debris should be placed on the surface of the counter. The countertop should be kept clean and smooth.

　　4. Before production, it is necessary to strictly inspect the screen to ensure that there is no blockage. When applying wet film, regular spot checks should be conducted to check if there is any garbage blocking the screen. When there is no printing after a certain period of time, the blank screen should be printed several times before printing, so that the diluent in the ink can fully dissolve the solidified ink and ensure smooth oil leakage from the screen.