Is there such a thing as a 2pt round score for a sheetfed press?

[Arazu]

We do a lot of jobs that are too large for our letterpress and we have to outsource the scoring. I would love to score them on the press but the only scoring strips I can find are quite thin and the paper still cracks.

Does anyone know of something similar to a 2pt round score for a press? It needs to handle cover stock with heavy ink coverage.

I've exhausted all of my vendor contacts.

Thanks in advance.

 

[nhprinter]

Don't know if this will be of any help, but it's a pretty neat system. There's an old thread on this forum about it if you do a search.

Perf Print Plus (PPP) - perforating, die-cutting, slitting, scoring, spot varnishing printing

 

[Al Ferrari]

If you want to keep the work in house, you can do it on your large sheet fed press using music wire which comes in a great variety of calipers.

music wire - Google Search

You will have to be inventive about mounting it on the back cylinder. I do it on a sheet of index with mylar tape, and in turn mount that to the back cylinder.

Al Ferrari

 

[Arazu]

Thank you both.

The link looks like they have heavy (0.026" is pretty much 2pt) scores.

The music wire is an awesome idea. Your method of mounting is exactly how we mount scores and perfs so nothing difficult there.

Thanks again. =)

 

[Al Ferrari]

"Your method of mounting is exactly how we mount scores and perfs so nothing difficult there."

But unlike those scores and perfs, the music wire will have no pressure sensitive adhesive back. So you will have to be a bit more inventive.

I stretch the wire between two bolts flush to a board, sneak the carrier stock under it, trap it with mylar tape, then cut the excess wire off the ends. I some times, first have a line of double sided tape on the carrier sheet so that the wire is held better, but that increases the likelihood of a tape shoulder showing on coated stocks.

Al Ferrari

 

[GazKL440]

We used to perforate 15 up on a modified 28" 6 col Akiyama, using the common impression cylinders for units 5-6 of the press. As we never ran spot colours on that press, we were able to remove some of the gripper pads and fit jackets to the cylinder faces (3 face common back cyl) and with no ink on the sheet at that point had no issues with sheets coming astray. We used the bolts that secured the grippers to hold onto the grip edge, and simply looped cable ties around the gripper bars to hold the tail, and this set up would keep together for at least 500000 runs before requiring attention(ony needing to change the perf wheels every once in a while)