HELP with a print problem!!!

Sheppy

Member
I have this job that has us scratching our heads here. Customer supplied pdf looks great on screen but when printed on our Cannon Image Press 810 there is a weird choppiness in a background gradient. Anyone ever dealt with something like this before. Picture attached
 

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AP90

Well-known member
Are you talking about the silver spots that kinda look like embossing? Could be your fuser belt is dirty or one of the rollers is dirty causing deletions in toner when going through.
 

Sheppy

Member
forgot to mention that I sent the file to another printer we do business with and he had the same issue.
 

keith1

Well-known member
You should post the original PDF file. Let's start by examining that. What it looks like on screen doesn't matter.
 

keith1

Well-known member
If I had a dime for every time I've heard “but it looks great on the screen” I'd be quite rich by now … :confused:

- Dov
No kidding! My response . . . I guess you'll need 5,000 monitors then! In fairness, people are more educated than a few years ago. And monitor quality has improved vastly. I used to have to ask; Is this a monitor you picked up at Walmart for $100.00? They were like early colour televisions. Still, it matters little what the screen looks like.
Now my pet peeve is those who proofread on a goddamn telephone . . . It's missing things . . . Eventually it comes out that they're trying to view on a phone. Always a top end i whatever mind you. Oh wait, I just got home and looked at it on my home computer.
Thanks Dov, for the opportunity to vent.
 

PrintingFools

Well-known member
I would have the same question. Am I able to review the file. I could probably fix whatever the issue is and send the file back to you. Then I would be able to explain what it took to fix the file. Happy Help, B
 

gregbatch

Well-known member
It's a transparency issue. Probably a rgb photo over a cmyk background. Save a copy, convert all to cmyk and flatten it.
 

namelessentity

Well-known member
Printed fine on my Imagepress750... I would guess it's what gregbatch said. Usually I see stuff like this when I use a hotfolder, but it goes away when I print with the print driver instead.
 

Magnus59

Well-known member
The Device-N shading was causing your problem. It works perfectly after Normalising with Prinergy without flattening. The Device-N shading converts to a process colour shading
 

gregbatch

Well-known member
gregbatch you nailed it. Converted everything to CMYK and flattened it. Looks awesome!! Thank you everyone for your input!
Honestly, once you converted all to CMYK your RIP probably would have handled it fine. The flattering was just a little insurance
 

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