Hi Erik, I think the best option is either Rilsan nylon or HDP (plastic) because they won't erode with use. Copper will begin to erode from the chemistries being used in the press, and will get desensitized over time. HDP repels water, and therefore has the best ink affinity. Nylon also has...
I know I'm a little late to this conversation, but is it possible your problem is static related. This would certainly be a problem when running UV Waterless. Just a thought.
The concept behind resin based technology is that the ink does not permeate into the pores of the material, so everything stays at the surface. This helps with better transfer and faster wash-ups. However, the cleaning solvents are critical to ensure good roller life. I can send you...
I know I'm biased, and probably shouldn't interject in this conversation, but there is new technology worthy of looking into. It's a resin based technology from Japan, made by Graphic, that improves ink transfer and clean up.
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