Here is a link to a prior thread on this same topic:
http://forum.luminous-landscape.com/index.php?action=search2I've had bad problems with 2 different P800's loading single sheet fine art thickness/weight paper. Here is my detailed method of feeding the paper (essentially Mark's method), but even with this, at least on PK ink paper, as I'm manipulating the paper to get it to pass through the printer, I manage to put crimps into about half the sheets I feed, thereby ruining them. I had no such problems in 7 years of using a 3800. I believe this to be a serious design flaw.
How to Load Fine Art Paper on P800
1. Open the front fine art paper tray and the rear paper feed chute.
2. Feed paper into the rear paper feed chute. It may feed in to the printhead area easily. Or.........It will go in about 1 or 2 inches then bump into a ridge. Skew the print a little toward one side or the other so a corner is bumping into the ridge. Slight pressure should get it to jump up over the ridge. Then square up the paper and proceed to feed a couple more inches into the print head area.
3. Open the top to see the print head area. You should have inserted the sheet enough so about 1” of it is visible.
4. Try to shove it all the way through, but it often will feed out the front UNDER the fine art tray. It needs to be raised to come out on top of, rather than under the tray.
5. To do this, take a sheet of paper (8.5x11 seems to work) similar to a stiff luster or glossy paper and insert it a couple inches into the front fine art tray. Looking in the opened top, you will see it enter the printhead area. Skew it so a corner goes up to the full sheet you’re feeding from the rear. You want to slide it under the print paper. Jiggle it or push it downward with your finger while shoving it in so it goes UNDER the print paper. This will allow the front edge of the print paper you’re feeding from the rear to come out ON TOP of the fine art paper tray. You may need to slide the lower sheet from one edge of the print paper to the other to get the print unstuck and riding up on both sides onto the fine art tray.
6. The print should come out onto the fine art tray. Remove the “guide” sheet. Line the print paper up at the front of the tray. Hit LOAD. After it rolls in to the correct “load” position, close the front fine art tray and extend the front output tray to catch the final print. Close the top cover.
7. Go to computer and go through the Lightroom print process. Be sure you’ve got Front Fine Art chosen in Print Settings in the Driver.
Many of these printers seem to have this problem. It shouldn't be this way.