Do you know what are the requirements of positive thermal CTP plate on the plate base？
With the development of printing industry towards high-end, personalized and high value-added, high-quality positive thermal CTP plate is more needed. In the production process of positive thermal CTP plate, aluminum coil as one of the most important raw materials, the quality of the aluminum coil directly affects the production of positive thermal CTP plate and quality.
Where is the plate base used?
The plate base is widely used in offset printing plates such as positive PS plate, thermal CTP plate, photosensitive CTP plate and Positive UV-CTP plate.
Specifications and parameters of plate base:
Alloy series: Series 1
Typical alloy: 1050A, 1060
Material status: H18
Thickness (mm): 0.15-0.40
Width (mm): 650-1420
Length (mm): C (according to user requirements)
The positive thermal CTP plate have very high requirements on the quality of the plate base. The positive thermal CTP plate not allow a little out-of-flatness of the Plate base, because most positive thermal CTP plate devices use scanning imaging, unlike positive PS plate printing, which we use vacuum pumping to make the plate and film fit closely. If the flatness of the plate is poor, then the laser imaging quality will be affected.
With the increasing demand of most printing plants for the printing capacity of positive thermal CTP plate, they will use the plates after baking, which can increase the printing capacity. Therefore, also need special attention to the baking resistance of aluminum plate base. There are two kinds of baking conditions, the 4 minutes at 280℃ and 10 minutes at 220℃. Normal recommend baking the plate to golden color is enough. If baking to brown color, then is over baking.
Now the global economy is seriously affected by the epidemic, the printing industry is in recession, and the price competition is increasingly fierce. Therefore, it is imperative for the plates manufacturer to reduce costs and improve competitiveness on the premise of ensuring quality. But many manufacturers often cut corners in order to reduce costs. So if you pay great attention to quality, you must not choose the lowest price, otherwise it is easy to buy plates with insufficient materials, so recommend you will not try, believe you will regret it. But for who don’t care to quality, then you can ignore this problem and choose low price products to try, which may surprise you.
