I see this question has come up with both the P800 and the 3000 and I want to know if anyone has an update with any answers. I have experienced the same issue:
" I just love the output overall, the colors are spot on what I'm trying, the resolution is excellent and so on. But when examining the photos more closely I found a problem on which I'd like to have some opinions.
Printing on Canson Baryta Photographique, you can see some faint roller marks on the gloss of the paper. Not bad enough to be immediately visible but when you examine the print at an angle with a hardish light, you can easily see the faint, straight patterns of the rollers in the gloss at a slightly shallower angle (=closer to you) than the one of the light otherwise reflecting from the paper. Also they are visible at certain angles when the print is held vertically and the light source is almost directly above. Those are especially easy to find on the left side of an A3-sized print, though visible at the whole width of the print. The spacing and position match to the exit rollers visible on the output, so I'm assuming that they are causing these patterns. Mostly you can see them only in some very dark tones, but because I like to do much B&W stuff, I find them quite annoying - at least now when I've first spotted them..
The relevant(?) print driver settings are:
Epson Premium Semigloss as a media type setting
Full quality, no high speed/bi-directional in use
Tested paper thicknesses 3-5
Platen gap wide.
Other settings default.
Tried both fine art feed and the normal feed, no difference. Except that the fine art feed also leaves some easily visible scratches to rear side of the paper... Epson seems to be quite rough at it's paper handling! The rear side is not a problem for me anyway, and if it was, the normal feed seems to handle the Canson equally well. The roller marks are not visible on a matte media, or plain stuff obviously, will try some other papers when I've got a chance.
Anyone having any experience and/or solutions for the issue? I've tried to search both the forums and did the usual googleing, but not sure I've found any specific issue with the exit rollers."
"I'm mostly thrilled with the new P800 but today I made 15x15 prints on 17x22 sheets using Canson's Baryta Photographique. On the third print I noticed a small series of parallel lines about an inch long starting near the top edge of the image and running about an inch into the photo. Clearly roller marks. I've tried adjusting the platten gap to Wide and changing the paper thickness from the default of 3 to 4--really bad--and to 2 which only made the marks farther apart. The lines only happen at the beginning of the image--the end of the sheet first out of the printer--and only on the top center. The rest of the image is clean.
Has anyone else experienced this and, if so, did you fix it? "
Updated answers would be greatly appreciated. Thanks.