1, The Introduction of Positive PS Plate
PS PLATE is the abbreviation of Presensitized Offset Plates. Positive PS Plate was developed by Henan Chalco Aluminum in order to adapt to the development of lithography. It has high resolution, full dot reproduction, rich levels, and ink balance easy to master, stable performance, fast sensitivity, large development latitude, high printing resistance etc characteristics. Since its listing, it has been favored by domestic and foreign customers.


 
2. The Technical Parameters of Positive PS Plate:
According to the printing process, the type of sensitizer applied in the of PS PLATE is divided into positive type and negative type. The positive type of PS PLATE is printed down with the positive original, to make the Positive PS Plate for printing on the machine ; the negative type of PS plate is printed down with the negative original, to make the negative ps plate for printing on the machine.
The printing plates produced by our company are:
Product Name: Positive PS Plate
Alloy temper: 1060, 1050A, 1100 H18
Thickness: 0.15mm- 0.4mm
Available specifications: various specifications or according to customer’s specifications
Common specifications: 570 * 510, 650 * 550, 670 * 560, 680 * 640, 730 * 605, 745 * 605, 755 * 625, 830 * 670, 915 * 715, 920 * 760, 1030 * 770, 1030 * 785 , 1030 * 790, 1030 * 795, 1030 * 800, 1030 * 820,etc.
Maximum width: 1350mm
Surface Roughness 0.5-0.8um
Plate base color density≤0.01
Mass per unit area of anodized layer 2.5-3.0g / m²
Mass per unit area of photosensitive layer 2.2-2.3g / m²
Sensitivity/Exposure energy: 100-140mj / m²
Spectral Sensitivity/Photosensitive wavelength: 300-550nm
Exposure Duration: 30 seconds, about 20 pulses
Developing time: 20-30 seconds
Developing temperature 22-25 ℃
Resolution : 2-99%
Safety light: Under yellow light
Run Length: Standard plate making 50,000-100,000 impressions, Baked plate ≥200,000 impressions
Storage period: 24 months, protected from light, moisture and heat
Storage conditions: Temperature ≤30 ℃, relative humidity ≤65 ℃, stacking height ≤1.5 meters


 
3 The Product Advantages of Positive PS Plate
1) The Positive PS Plate  has proprietary matte surface treatment technology, fast pumping time, fast sensitivity, good alkali resistance and good printing resistance
2) The Positive PS Plate  has good stability and excellent dot reproduction, which can realize long-pass printing
3) The Positive PS Plate  whcih has the rich and delicate electrolytic oxidation hydrophilic layer, and the printing water retention and wear resistance are excellent
4) The Positive PS Plate  has a large development tolerance
5) The Positive PS Plate has high sensitivity
6) The Positive PS Plate  has good adaptability: suitable for all mainstream printing dwon machines, developing machines and developer
 
4.The Usage of Positive PS Plate
Our company's Positive PS Plate is suitable for all the mainstream printing down machines, developing machines and developer, widely used in all kinds of graphic offset printing.
 
5.The Packaging of Positive PS Plate
The packaging of Positive PS Plate produced by our company: two coated faces are placed facing each other, separated by neutral backing paper in the middle, the outside is covered with plastic lined black kraft paper and placed in the carton box,each carton box is loaded around 50 -100 pieces,
Then stack the loaded carton boxes neatly on the wooden pallet and protect them with wooden frames or cardboard.
Finally, wrap it with kraft paper or plastic film and tighten by plastic tapes.
Or Packed according to customer requirements.