What causes the weakening of the plates in offset printing:

1.  Low quality ink.

2. Low quality additives in ink and water

3. Extra alcohol

4.  Paper lint

5.  The extra pressure between plate and blanket cylinders   

6.  Low quality blanket

7.  Extra plate washing, especially with the S.P.A. 

8.   Washing your plate  with non-standard permitted  materials.

9.  Late washing of the blanket

10.  Inappropriate paper