“东方”CTCP版
| 版材 | 铝版 |
| description of positive plate(ctcp) | ||||||||
| plate type | conventional posititve | |||||||
| substrate | electromechanically grained and anodized lithographic aluminium. | |||||||
| alloy | standard 1050 alloy. | |||||||
| gauge available | 0.15, 0.20,0.25, 0.30,0.40 (mm) | |||||||
| maximum width | 1,240 mm | |||||||
| handling | plates are light sensitive. handle under yellow safelight (uv free) until processed. | |||||||
| colour change | blue green to pale green | |||||||
| light source and exposure | automatic plate maker is recommendable. light source: iodine-gallium lamp/metal halide lamp. exposure condition - step tablet: 3 step clear, power of light: 4 kw, time: 15-25 seconds. | |||||||
| 1 meter distance between plate and lamp. | ||||||||
| process | conventional | |||||||
| developer | dongfang positive developer of universal positive developer is recommended. dilution - 1 (developer) : 3 (water). | |||||||
| recommended developer temperature | 26 - 28°c by machine | |||||||
| development time | 30 seconds | |||||||
| deletion | conventional pens | |||||||
| shelf life | 18 - 24 months when stored in a dark, cool and dry space. | |||||||
| recommended processing | automatic plate processor is recommended. | |||||||
| length of run | 40,000-100,000 copies of impression. depends upon printing condition like press, ink, paper and so on. | |||||||
| plate cleaner compatibility | universal plate cleaner is recommended. | |||||||
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