Photopolymereplates crumbles

Hi,

I’ve discovered a problem with my plates,
They crumbles on several places on the plate when I rub with my fingers. not even hard.
not everywhere. see photos

My lighting time
- 3 minutes
- 5 min washing
- 5 min drying
- 3 min afterlighting.

thx for the answer.

grtz

Frederik

image: IMG9777.JPG

IMG9777.JPG

image: IMG9776.JPG

IMG9776.JPG

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Have you tried increasing your initial exposure time? Maybe there are not fully developing.