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Author Topic: Fingerprints on Plates  (Read 870 times)

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Online pspdfppdfxhd

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Re: Fingerprints on Plates
« Reply #15 on: July 10, 2019, 11:32:23 AM »
No auto-loader here. Hand loaded into platesetter. I've never been able to narrow it down to a certain individual either. Seems to be mostly on plates where after they've processed we have to cut down on a manual cutter. A lot of folks will steady it by pushing down on it. Maybe I should require gloves when doing that process and see if it clears up any.

Thank you all for your suggestions and advice. I certainly appreciate it.
You've got fingerprints - it should be easy to identify whose they are with a loupe.

About 20 years ago, I had a brief stint at a billboard printing company and they used 77 inch plates. Took awhile to learn how to manouver those.

Offline Farabomb

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Re: Fingerprints on Plates
« Reply #16 on: July 10, 2019, 12:03:49 PM »
That's a big ass plate. I assume very carefully was how you move those.
Speed doesn't kill, rapidly becoming stationary is the problem

I'd rather have stories told than be telling stories of what I could have done.

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Offline Savage

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Re: Fingerprints on Plates
« Reply #17 on: July 11, 2019, 10:23:36 AM »
Had the same problem with the same plates. We eventually figured out that the fingerprints where from the press operators when loading the plates to the press.
We solved it by changing the gum. We used the finishing gum on a 1:2 dilution. We changed to 1:1 and the problem went away.
Hope it helps.

Edit: I just remebered another thing. At the time we used Fuji's FN-6E gum. At the time of the problem, our Fuji rep advised us to change to another gum (besides changing the dilution). So, after we finished all the FN-6E gum we had in stock (without further issues), we changed to Fuji's FG-8E gum. We kept the 1:1 dilution, and haven't had any issue since.
« Last Edit: July 11, 2019, 10:56:46 AM by Savage »

Offline Possum

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Re: Fingerprints on Plates
« Reply #18 on: July 11, 2019, 10:27:09 AM »
So the guys complaining were the guys causing the problem. Figures.
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Offline Savage

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Re: Fingerprints on Plates
« Reply #19 on: July 11, 2019, 11:01:06 AM »
So the guys complaining were the guys causing the problem. Figures.
Yes, but trying to convince them that they're the ones causing it is an almost inpossible task! :deadhorse:
I should win a Nobel Prize just for trying! :lmao:

Offline Tracy

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Re: Fingerprints on Plates
« Reply #20 on: July 11, 2019, 03:29:30 PM »
 :laugh: I was wondering if it was the Press Ops!!

Offline scottrsimons

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Re: Fingerprints on Plates
« Reply #21 on: July 12, 2019, 07:13:46 AM »
It's never the Press Ops!! At least in out shop. It's always Prepress!!
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Offline AaronH

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Re: Fingerprints on Plates
« Reply #22 on: July 12, 2019, 12:29:16 PM »
It's never the Press Ops!! At least in out shop. It's always Prepress!!

Especially if they punch the plate wrong and it's now off center. Definitely prepress' fault for not imaging the place centered in the machine that measures the plate to know where to start and make sure its centered...
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