Wrinkling on 100lb gloss text

Robohopar

Well-known member
Hi guys,

I've had this issue for quite a while now. This started back when I was printing on my Canon C710. What would happen is when I would print double sided 100lb text that was high in print colors or saturation, it would spit the sheets out with wrinkling or almost a burning of the sheet. Every time I would call canon out on this issue they would replace the upper and lower fuser units and it seemed like it would get better. The fuser would be changed at maybe 10-20% of its life expectancy. All paper profiles were set correctly according to the GSM of the paper.

Fast forward a bit, I got the Konica C7090 and I would see the same/similar type of issues with this machine as well. They blamed the paper but luckily I had 3 different brands of 100lb gloss text with me and it would do it on all of them. Then they blamed the artwork stating it's had too much saturation on the colors. What they suggested and set up for me was a paper profile for the 100# with much lower GSM(heat) setting to print those specific double sided high saturation jobs. Problem with that is it prints without the toner smearing but it would be a super dull and matte finish.

Now when I print in that low setting, it's starting to jam and spit out wrinkled sheets of paper.

Not sure what to make of this, seemed like this would be more of a known issue in the digital print community since it's happening on two different machines. One of the Konica specialists suggested I lower the density in the fiery to have it lay less toner on the sheets but still obtaining the same color which im not sure if that's possible.

Anyone else have this issue or maybe a suggestion. Any input would be appreciated. I've attached a couple images for reference.
 

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Have you tried flattening the file? Sometimes that works if there's too many layers involved in the file.
 
What is the composition of the rich black? You can get too much toner on the sheet. When the first side fuses it shrinks and pulls the sheet into a slight pucker, then when it goes through the fuser on the second side it creases. I never go above 200%. 40-30-30-100
 
@Stickman42 - Yes, tried that, no luck
@tngcas - Yup, I always flatten during imposition
@gregbatch - Usually 60/40/40/100 ( rich black) from what I know. But it happens with all colors, not only black.
@narseman - Any suggestions on where I can check to get directions on how to do that? Or is it an easy option I missed on the workstation?
 
Then I would lean toward heat, perhaps excessive, combined with the crappy paper they have been delivering that last few years. I really have to crank magnification to compensate for shrinkage. I don't get wrinkles or creasing with the belt fuser on the Ricoh.
 
Is your stock stored in the same room as the machine?
Has the stock been in the room sufficient time to condition prior to printing?
If the stock is stored in a different location, it should be unwrapped and moved into the print room and allowed to condition.
Lighter weight stocks are particularly susceptible if the moisture content is too high or too low. As previously mentioned, grain direction can also cause this issue.
 
@Magnus59 Yes, they are. I have the kelly digital and tango stock thats stored in the boxes and some I've used in the past that's been wrapped. Both stay in the same room. Now, I'm not sure what constitutes conditioning of the paper but its just hard to see why its hard for a machine to print 148GSM paper on its correct setting. When the techs come print test pages out with full saturation of one color on both sides, it prints fine. Must be my files, not the paper or settings.
 
Sorry.. I'm not so familiar with Fiery. Will try to ask my guys tomorrow. But the idea is sound. Makes good sense..
So, there is an option.. Available in the print dialogue or in job properties in the fiery screen. Under Properties, go to Image. Then Brightness. There are options to reduce brightness various levels, down to 85%. This will reduce the amount of toner being applied. There is also a Curve adjuster, which needs a bit of skill to use, that can also help. But the bright setting is the quick easy move, if you haven't tried it already.
 
I know the brightness option but haven't ever tried the curve option. I know the brightness option may affect the actual color of the job and tone it down but I'd like to use an option that won't change the color much. I'll look into that curve option. Thank you
 
I don't mean during imposition. Flatten the file in photoshop before putting into the fiery. I'm not sure 100% why but it produces a different result than the fiery flattening process.
Oh got it. I use illustrator and usually only export vector files to print.
 

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