Aluminum Printing Plates: PS Plate and CTP Plate

The aluminum plate is one of the basic elements to make high-quality PS plate wholesale. So far, in the selection of PS plate substrates, no better material that can replace aluminum plates has been found. With the vigorous development of domestic printing industry, the market and production capacity of PS plates and PS plate subsrate have grown rapidly.

As a positive ps plates manufacturer, we also produce the main raw materials for the production of PS plates: aluminum plates and photosensitive glue. For the aluminum plate of the PS plate, it is generally required to have the following characteristics:

• It has sufficient strength as a support.

• it has good dimensional viscosity and flatness to ensure printing accurancy.

• It has the needed surface state and chemical composition suitable for the template.

In recent years, the printing format has a trend of bipolar development. On the one hand, it is developing to a super-large format. The demand for PS plates with specifications of 1610mm×1310mm and above is increasing day by day. The aluminum plate itself for the super-large PS plates must not have bulges and loose-leaf edges.

As we all know, the CTP printing technology can bring many benefits to printing like excellent imaging quality, nearly perfect calibration, and fast production turnover. However, its various advantages are not only attributed to the imaging equipment, but also depend on the quality and performance of the CTP printing plates.

In traditional plate making, whether the dots can be accurately positioned on the CTP plate epends largely on whether the position of the imposition and positioning register device is accurate when using a vacuum device or a continuous copy device. In any case, this requires the printing plate to be quite flat.

Because the digital printing plate is exposed by focusing the energy emitted by the laser light source, the flatness requirements of the digital plate, including the surface treatment of the aluminum base, are more stringent.

In addition, the use of energy-focused imaging is different from direct imaging, which means that there will be no visible streaks when imaging on the digital plate. The aluminum plate base is not allowed to have streaks during the anodizing and grinding.

There are several tips for buying thermal CTP plate. The first step is the strict control of aluminum plate. The lattice point quality of CTP computer to plate will directly affects the quality of the printed product, whith in turn affects the reproduction of the entire printing process. Therefore, the first step to choose a thermal CTP plate with good dot reproducibility.

Next is the coating thickness. Haomei thermal CTP plate adopts the unique coating formula, which makes the coating thickness of the pure aluminum plate more uniform, so as to ensure that the lattice point error is within 1% without the addition of dot calibration curve.

Another is printability. To improve the printability of CTP plate, the aluminum base plate has been undergone special treatment. In addition, in order to ensure better hydrophilicity of the positive CTP plate, there is a special hydrophilic layer on the aluminum base plate to ensure good wettability and ink affinity during the printing process.

The adaptability of CTP plates is also very important. Haomei positive thermal CTP plate can be adapted to the thermal CTP plate making machines of many domestic and foreign brands with a wavelength of 830nm, such as Kodak, Netscreen, Heidelberg, Corey, Polytech, Huarui Jingyi, etc.