Set Print poly plate does not hold ink

[STS Tech]

We have a customer who started using Dot Print (Agfa's Set Print) poly plate. He ran out of material the other day. He got two new rolls of material both different emolutions and neither plate will hold ink on the press.

Everything worked the day before, nothing on the processor, exposure or press changed. We tried an old plate which holds ink

Any ideas?

Thanks

Doug Stewart
STS Technical Service

 

[VladCanada]

To give you a correct answer I would like to know what the word emolutions means
If I guess right -> emulsions, then never ever try to "mix up" the media and the chemistry (activator and stabiliser) from different manufacturers: Mitsubishi SilverPlate developed with AGFA chemistry and vice versa, for instance.

Your Customer is not the first, who put that wrong "step on the laid rake".

 

[STS Tech]

Roll were from different emulsion (I believe I spelled it wrong) master rolls (coatings). We are using the same chemistry as for the old rolls. Nothing changed but the new rolls. Old plates work on press.

Thanks

Doug

 

[VladCanada]

AGFA SetPrint has only one type of emulsion and after developing process it looks like black background and grey silver text/picture (which is ink receptive).
In your Customer case there was not accomplished silver diffusion process, so there was nothing to hold the ink on the text/image.
Diagnose: media was developed with not suitable chemistry.

 

[STS Tech]

Customer was not truthful about chemistry, seems it was a lot older that he thought Spent 8 hours yesterday repairing the processor, heaters out, no replenishment speed not correct etc. No wonder he had problems
Thanks for you input
Doug Stewart
STS Technical Service

 

[KimSaks]

Sounds like old or contaminated Activator in the processor.

 

[VladCanada]

We have a customer who started using Dot Print (Agfa's Set Print) poly plate.

Doug was completely wrong thinking DotPrint is the same as SetPrint
Dot Works and AGFA are two different manufacturers, and even processed Dot Print media looks different: black background and blue text/picture.
The source: http://www.dotworks.com/pdf/dotprint.pdf