We are a county in-plant and we run
at least a pallet of NCR forms each week. The amount was causing issues on digital toner presses in the past, so we switched to digital duplicators. These use a liquid ink and a master film that is automatically made inside the printer. There is no heat, and an extremely short paper path, so the NCR coating doesn't cause any feeding issues. They are not high resolution, but this is not normally an issue for NCR forms which are meant to be transactional, not high quality marketing pieces. We had the
Duplo line for about 5 years and they worked fine. When it came time to replace them, we went to bid about 2 years ago and switched to
RISO SF9450's. The units have worked about the same as the Duplo's, but do have occasional double-sheet feeding issues. These digital duplicators are very low cost to purchase (I think they were under $5k US each), and the cost per impression is the same or less than what you'd pay on a monochrome digital toner press. The more prints you get out of a master, the lower the cost per sheet. We can usually run 10-15 reams before the film starts breaking down and we need to re-send. The digital duplicators come in 1 or 2 colors, and you can easily swap the color for a number of standard colors such as red, green, reflex blue, and black. They also run off a standard power outlet.
One thing that could be a drawback for someone who is used to running an offset press, is these units only hold 1-2 reams in the feeding tray. This is not an issue for us because we have two side-by-side and one operator can easily run both at the same time. We have our operators load one ream at a time in each because it's easier to quickly grab out the printed ream and press start on the next ream so it continues running while you're stacking up your NCR paper on the glue padding station.
RISO also carries a line of full-color inkjet units which I think is what
@gregbatch is referring to. We have not had experience with those, but they appear to have the same feeding systems and paper path, along with no heat, so I'm sure they'd work well in that sense - but I'd imagine the cost per print is higher than the digital duplicator line.
EDIT: We sell our forms by the case (5,000 sheets) and it's quite common for our customers to order 2-3 cases of each form. So we're running 5,000-15,000 sheets per run. If customers want numbered NCR forms, we print those using a variable data software on our Konica Minolta 6136's, which are monochrome toner digital presses. Also, most of our forms are 1-sided. When we run a 2-sided form, they are typically shorter runs, and we usually run those on the Konica 6136's as well, but we could run them on the RISO's if we wanted to.