Registering round coasters?

Hello printers!

ever thougt about registering round coasters for multicolor printing? Just came across the idea.
Are there any old-time-tricks for doing this?

Thanks in advance.

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Fairly simple if you print slowly on a platen press.
Stack several round coasters and make a small vertical nick in the edge with a razor blade.
Use three gage pins at 10, 12 and 2 o’clock. Seat one coaster and make a pencil mark at 6 o’clock on the tympan sheet
Register the nick in all coasters to the pencil mark for each color.

Print image and register marks on square sheets of coaster paper. Die cut after printing.

Is square coaster stock available from most paper suppliers? Is it called coaster paper or stock? Is there another name for it?

It’s really just any kind of paperboard. It becomes a coaster when you call it that, but naturally an absorbent paper is typically preferred.

You could use blotter paper.

I have done this and you can see a sample at

I used a slightly differnet method than listed with guage pins because I was using the thickest coaster stock available. I took one coaster and cut the shape of another coaster from it leaving a quarter moon type shape. I taped this to the tympan and it supported the entire bottom of the coaster and gave a consistant round surface to guide to. I then as previously posted made a nick on the edges of all coaster stock and aligned that nick to a mark I could easily see on the tympan. Using a C&P NS with treadle the speed is easily controlled. -Clay

Isn’t this nick visible after the job is finished? I have someone who wants business cards printed as coasters and I’m trying to figure out the easiest way to do it. It’s 2/2, so registration is pretty critical.

Additionally, anyone know of any die makers in the NY/NJ area?

I use the same half-moon technique as clayoliff. Works fantastic! I think you’d probably have to be half crazy to do a 2/2 job on a round coaster, though. Doomed to failure.

I have a source for small quantities of 60pt pulpboard. It’s in Barnaby, BC. The shipping is murder but the stock is fantastic. They will cut to the size you request for a small fee.

A good die maker is Key Dies in Annville, PA. They continue to do amazingly precise, detailed work for me. They are extremely fast with quotes, and work very quickly.

I kind of think I’m crazy too. I’m leaning towards printing it 4 up on a sheet and having it die cut. I think I’ll have an easier time with the registration.