PS printing aluminum sheets, also known as pre coated photosensitive plate, refers to the aluminum plate for printing, which is a lithographic printing plate with a photosensitive resin layer pre coated on the aluminum plate by the manufacturer. PS plate is composed of photosensitive layer and supporting aluminum substrate or plate base. Due to the high annual consumption of PS plate, the number of aluminum plates required is also very high. Aluminum plate is not only its important support, but also plays an important role in the performance of PS version.
What alloys are suitable for PS plate?
For the aluminum plate making PS plate, it is required to have sufficient strength, good dimensional viscosity and flatness, and adapt to the surface state and chemical composition of the solution template. At present, most PS plates are rolled with 1060 and 1070 aluminum alloys with a thickness of 0.2-0.28mm, and a few are produced with 3003 aluminum alloy. 1060-h18 alloy is commonly used. In addition to making PS board for printing, it is also widely used in offset printing boards such as positive PS board, thermal CTP board, photosensitive CTP board and UV-CTP board.
Due to the high requirements for surface quality and flatness of PS plate-based aluminum strip, in order to obtain high-quality PS plate-based strip, a special straightening method must be adopted after cold rolling. In addition, the sand mesh value of PS board is generally 0.60 ~ 0.80 μ m. In order to obtain finer sand mesh, the internal composition of aluminum plate base is the key, that is, it is related to the content and composition of trace special metals contained in aluminum alloy.