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East Positive Scribing PS Plate Usage Direction

　　　With advanced automatic Spool PS Plate production flow line, adopting worldly advanced multilayer graining technology, Oriental Printing Plate Material Plant Taizhou, Jiangsu produces Oriental Positive Scribing PS Plate that has stable quality, excellent performance, good gradation reduction, anti-pollution, high resolution, and printing resistance. If by proper exposal and develop, it produces better effect.

　　　 Recommended Usage (for reference):

　　　 1. Exposal
　　　 1.1 In practical usage, fix the proper exposal time, according to the light source, power, wear degree, light distance etc,
　　　 1.2 The film density not lower than 3.8
　　　 1.3 If use thirteen grade continuous gray ladder gauge to fix the best exposal time, color plate should be burnt to 0.60 (fourth grade); and proof plate should be burnt to 0.45 (third grade)
　　　 1.4 Having fixed exposal time, burn plate, develop properly and observe whether 2% net point and 10 U have good resolution. And revise and confirm it in time.
　　　 1.5 Example: 3KW iodine gallium light, 1.2M light distance, new bulb, the correct exposal time is 80S±10S.

　　　 2. Develop In develop, Oriental PS Plate Develop Powder may be used. 12 kg clean water should be added into one bag of develop powder (with sodium hydroxide that is dissolved by warm water) Develop temperature: 23℃±1℃ Develop time: 20S-30S (note: for aging develop solution, the develop time must be prolonged.)
　　　 2.1 if the develop solution is over-concentrated, the plate oxide layer may be destroyed. And the plate will become blurred and its anti-printing force will drop.
　　　 2.2 if the develop solution is under-concentrated, test it with "test strip" ; burn it 2-98% net point for proof plate; 3-97% net point for run-on plate, depending on the density of solution.
　　　 2.3 when preparing develop solution, it must be well agitated and completely dissolved. If not used immediately, put it in sealed container to avoid failure.
　　　 2.4 with the increase of develop amount, the efficacy of develop solution drops. The darkening color also affects observation. So develop solution must be compensated and replaced regularly. To strengthen the spreading property of develop solution and surface active agent, the develop solution has large allowance and the hydrophily is reinforced.

"East" PS Plate Ordinary Troubles and Solutions

Troubles	Cause	Solutions
The plate is contaminated	1. There are scars and filth on the printer glass or original plate 2. Deficient exposal 3. Short develop time 4. Low temperature of develop solution 5. Aging develop solution or failure 6. There is shade on the non-design part of original plate 7. Not properly cleaned	1. Clean printer glass and original plate 2. Increase exposal amount (time) 3 Prolong develop time 4. Raise develop solution temperature 5. Compensate or replace develop solution 6. Remake plate and prolong exposal time 7. After cleaning, examine the effect and clean out the cleaning agent.
The picture is unfirm; not properly inked	1. Over-exposal 2. Over high temperature of develop solution 3. High concentration of develop solution 4. Overlong time develop 5. Deficient density of original design 6. Deficient air pump 7. Uneven frictioning; not dried after develop	1. Shorten exposal time 2. Drop to appropriate temperature 3. Dilute it with water to drop the concentration 4. Shorten develop time 5. Remake plate 6. Check vacuum effect 7. Properly store it and operate carefully
unfirm ink holdout of the picture	1. Incomplete develop or cleaning and there are filth accumulated on the developing machine 2. There is colloidalmatter in the design 3. There is Water left when applying glue, or duster cloth is not dry. 4. Not thoroughly wiped	1. Sufficient develop and washing; periodical cleaning 2. Careful retouching glue, if there is colloidalmatter found, wipe it off with wet towel immediately 3. Working table must be dry and duster cloth must be clean, dry and exclusive. 4. Overall wiping without omission.