How to calculate pressure needed for a score?

324 inches on an 8 1/2 x 5 1/2 sheet? that’s 27 feet of rule?

That’s correct. You can see why I’m concerned about having enough pressure.

i think this might be a crazy project in that just putting the matrix down sounds impossible.
i have done intricate stuff like this in multiple passes with multiple dies.

You may be able to use a heated brass or magnesium die to do the work if the paper takes an impression well, but that is a very intricate design, indeed. Wouldn’t pre-scoring take some of the skill out of the origami?

IMHO Mr. Harold S. is pulling your leg. If he had several kluges then he knows the answer to his question….whiskey tango foxtrot…..geez just google his name!

I didn’t say “I” had several Kluges. I said “we”, as in the company I work for. I don’t run them myself, but one of the operators asked me to check on this for him. If the answer to my question is so prevalent, it should be very easy to simply post it.

And I happen to be an Adam Carolla fan…so what? If I was going to pull someone’s leg, I can assure you I wouldn’t have happened to stumble into this completely obscure discussion board to do it.

But anyway, the idea of using two separate dies might be a good one, but the feeding on the second pass may be complicated.

I’ve attached a couple photos of the die….and our Kluges for Ms. Girl.

SSPX0065-1.JPG

SSPX0064-1.JPG

SSPX0063-1.JPG

You have to admit it would be a good joke to ask a serious question about printing on a printing forum having already known the answer.

I believe that makes it trolling. ;)

Harry Seaward, the pressure for 324 linear feet of score
is the same pressure for 1 linear inch of score, do you price the jobs based on pressure? the operator knows the correct amount of pressure, has the operator asked you about halftone dots? or typelice infecting the press room?
best to you, Fleetus Mackenzy

How could the required pressure for two different lengths of scoring be the same?

The pressure the press exerts will be the same either way, true, but I believe the question is can the press handle the required pressure. Not sure about required pressure for scoring or much about Kluges, but on a Windmill, just for example, if that were cutting rule, you would really be pushing the press past where it should go.

Call Kluge and ask for Mutt or Kevin
(800) 826-7320

Where are the safety guards for all those Kluges? I feel sorry for your pressmen.

modernman, you answered your own question, in your 2nd sentance. The question seems to be a hoax. Lets look at the question, like this-I am going to print 324 “M’s” how much pressure do I need? The same pressure as 1 “M”. Professional scoring is done with scoring rule and creasing matrix not a great deal of pressure is required for
a good score,with diecutting the cutting should just kiss
the jacket or plate again just enough pressure to cut the stock. best james

I disagree that it takes the same pressure to print one M than it does 324. If I lock up a 9”x14” form to print on a 10”x15” platen press I am going to run into serious issues.

Even more-so for die-cutting. It takes a certain amount of pressure per linear inch to cut through paper, depending on caliper and density. I’ve heard it starts at about 200 pounds, so a Windmill, which prints with 40 tons pressure can cut about 400 inches of thin stock.

In your mind, James, if I can cut through one linear inch of 220# lettra, I can just as easily lock up 60 ten inch strips of cutting rule on my Windmill and cut the sheet cleanly into 60 little strips? I think that the machine wouldn’t be able to do it, and if it could, it would wear the bearings of the press much too quickly. Isn’t that why lettepresses and die-cutters are rated to a certain tonnage?

Sorry, I guess I asked the question wrong, but modernman seems to have understood what I was asking, which was can the press handle the pressure required to score 324 linear inches of score?

Since this “obvious” answer evaded me in my google search, I thought I would find the answer in a letterpress forum. So you’ve all seen the die and you all know the matrix will be very time consuming to assemble. Before spending the time to set it up, I’d like to ask one last time if the press can handle the pressure needed to score .007” paper.

Not to beat a dead horse, but let’s pretend I knew the answer to this question, but asked it here anyway. What’s my end game? Not only that, there’s clearly some debate among the “experts” re: pressure so the answer doesn’t seem to be as obvious as some have indicated.

If you are creasing with matrix I would say go for it. Less pressure is needed to do that than to print or die-cut and it seems to me you won’t have any problems.

However, I’m no expert. If someone could chime in with a Kluge impression strength in tonnes and the pressure per inch per 0.001” of stock needed to crease that would be best.

for this i would lay down something sort of thick to hit against. i call it cover stock. i use it to cover an embossing counter for longer runs. a .007 stock is not going to react to a score much anyways just “give one the idea” of where to fold. you would make-ready this so as to get an even impression. much easier and faster than matrix, with which you won’t like the results anyway. (too much stretching of the stock)