Positive UV-I PS Plate

Product name: Positive UV-I PS Plate

Specifications:

Width, mm: ≤1800
Thickness, mm: 0.15-0.3
Surface roughness, μm: 0.55 -0.80
Oxidation layer weight, g/m²: 2.50-3.00
Sensitization layer weight, g/m²: 2.10-2.30
Exposure energy, J/cm²: 150-180
Dot reproduction ability, %: 2-98
Definition, μm: ≤10
Run-length: 50,000-100,000

Features:

♦  The surface of the plate is of grains,shortening the time of evacuating the vacuum,reducing the halation between the exposure district and the non-exposure district.
♦  Well distributed multigrains
♦  Faster exposing speed
♦  Good dot-reproduction
♦  Strong latitude adaptability

Instructions:

♦  Exposure:
Iodine gallium light of plate copying apparatus -- 3kw
Light distance: 1m
Exposure time: 50-70 seconds

♦  Developing:

Developer powder and liquid for conventional plates
Developer liquid preparation:
For machine developing: Vconcentrate : Vwater = 1 : 4
For hand developing: Vconcentrate : Vwater = 1 : 8
Developer powder preparation:
Totally dissolve one bag of developer powder in 15 liters water
Developing time: around 30 seconds
Developing temperature: 23±2°C

♦  Removing: The plate should be cleaned by water immediately when image remover paste or liquid are used on it, which normally not be over 45 seconds.

♦  Gumming: To avoid plate surface getting oxide and strengthen hydrophilic ability, protection gum should be put uniformly on the cleaned plate.

♦  Baking:

Baking temperature: 250°C
Baking time: 5 - 8 minutes

♦  Stock and Unseal:

Stock temperature: 10 - 30°C
Humidity: ≤65%
Safety light: Yellow light

♦  Shelf life: 18 months