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1. The quality of the original manuscript; 

2. Factors of electricity, scanning and plate making;

3. Printing equipment, printing methods, printing pressure and ink balance relationship factors; 

4.Paper  

5. Ink 

6. Printing environment, mainly refers to the temperature, humidity change factors; 

7. Technical quality factors for printing operators; 

8. Post-processing factors, including cutting, binding, laminating, laminating, shaping, etc..