| Ink Smearing and Printing Through To The Paper's Back
An ink problem that is worse for me is print through to the back of the paper. In printing a book I found that I had to discard cheap 20 lb bond for the slightly heavier and more expensive 24/60 lb weight (brand: Wausau paper 96 brightness white Exact Ice #58601). I cut back on ink density to a minimum and as well made the master on manual scan light, which might also cut the smearing. With time the ink dries somewhat but even on a book done a year ago under the conditions I just described, you can still get a smear if you work at it (especially with bold headlines).
I would suggest trying to see if a heat lamp or halogen lamp would dry the ink. If so, maybe you could securely position such a lamp to heat the paper just as it comes off the delivery tapes printing at slow speed. But these lamps can set fires so be sure the paper doesn't come in contact with them, keeps moving and I would always have my eyeballs on it. Another possibility would be to fix up some kind of conveyor that takes each sheet before it drops into the delivery tray and then subject each sheet to a more prolonged treatment of heat and light.
I wonder if operating the Riso in a cooler environment that chills the ink would cut down on the density of the ink on the paper.
I asked an experienced GR 3770 repairman if there was some internal setting by which one could cut the ink further than the keyboard controls allowed. He said there wasn't. I don't know if newer model Riso machines have more control over the ink, maybe the ones with computer hookups? Good luck! | 
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