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Dutyhog Profile
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a safe way to remove paper curl and warp?


 I bought a pack of A3 baryta paper last month, and opened the box to print yesterday. The paper was very curled - so curled that I could hear head strikes when printing, and the paper jammed and twisted at the end.

This paper is Pinnacle Fibre Gloss, 320gsm baryta coated, but I’ve had the same problem at times in the past with Hahnemuhle and Harman versions. It damaged an HP70 printhead on my HP B8860 printer.

Is there a safe way to remove curl and warp of this paper?  Some suggestions I've had are to roll it the other way round a tube, use clean dry hands to curl all the edges back, or flatten the sheet over a table edge. All of these need fairly rough handling, and could mess up the coated surface.

Gordon

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Re: a safe way to remove paper curl and warp?


I would not suggest rolling the paper the other way because you run the risk of cracking the coating which if happens will lead you down another rabbit hole.

You could try changing the Platten Gap on the Printer to Wider which usually does fix the head strike issues

Hahnemuhle i found is bad for curls, what I have done is to turn the paper over, and place a have object onto of it and leave it, sometimes unto 24 hours.

if that does not cure it, ring Chris at paper Spectrum and he should replace it for you.

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Dutyhog Profile
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Re: a safe way to remove paper curl and warp?


Thanks for the suggestions, Ian.

The platen gap is at maximum - it always is on this HP B8850 printer when using the straight through feed.

I'll try the heavy object over the next 24 hours.

And I did send an email to Paper Spectrum to ask why the A4 baryta is OK but not the A3, and if they have any cures for it.

One thing I tried was to put some Hahnemuhle paper onto a moist paper towel. The curl got worse when in contact with the back side. It got better when in contact with the coated side - not useful for printing. But it suggest that drying the reverse side may help, perhaps placing onto a warm surface, or with a hair drier?

I'll post again if I find a good solution.

Gordon

Last edited by Dutyhog, 28/Sep/14, 10:59 am


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Re: a safe way to remove paper curl and warp?


Another tip Gordon, when you get a box of paper the coated side of FAP always faces the lid so flip the box over and let gravity help.

You can very gently curl the edges back without damage as long as the angel of turn is not to steep , a gentle curve is OK I have done that many times with no problem.

Or if the problem is driving you mad try and use double coated paper, the double coating stops the curl.

It could be the combination of both paper and printer, Epson printers 3880 upwards are very good at handling them, if I get a curl that is hard to feed on the back of the printer feeding from the front always works, does your printer feed give a choice of front and back feed, if it does use the front feed.

 

Last edited by martinimages, 28/Sep/14, 2:11 pm


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eternumviti Profile
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Re: a safe way to remove paper curl and warp?


I have had exactly the same problem with the Pinnacle Fibre Gloss 320.
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Re: a safe way to remove paper curl and warp?


Thanks, Martin, for the tip. I've put two lots of paper coated side down with heavy books on top, and after trying this for a day will store them that way up in future. I guess that packing the box with scrap paper to fill it will help put on an even pressure in a pile of boxes.

I was very keen to make one particular A3 print today, and experimented with the hair drier. I placed the paper coated side away from the drier and heated the curled edges. After few seconds the curl reversed direction, and the paper seemed more flexible. This let me get the paper into the printer and printed out without head strikes before it cooled and hardened again to its curled shape. So tedious, but successful. I'm wondering if the problem goes away in the winter when I have the room cosily warm, rather than like today- full of fresh Argyll coastal air with the window open next to the printer.

Gordon

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28/Sep/14, 3:41 pm Link to this post Send Email to Dutyhog   Send PM to Dutyhog
 
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Re: a safe way to remove paper curl and warp?


There is no doubt Gordon that temperature will have an effect on the curl, anyway you seem to have a work around so that's good emoticon

Martin

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"After that shutter closes it’s all over. The physical light captured on film is all that is left, a history of light preserved in chemical form, and I have to move on to the next one."

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Dutyhog Profile
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Re: a safe way to remove paper curl and warp?


I'm pleased to say that Chris at Paper Spectrum did send a replacement box of paper, and it was flat. I've stored it coated side down, in an airtight bag with other boxes of paper, and it's stayed flat for the month that I've had it.

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28/Oct/14, 4:44 pm Link to this post Send Email to Dutyhog   Send PM to Dutyhog
 
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Re: a safe way to remove paper curl and warp?


Problem solved then Gordon emoticon

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"After that shutter closes it’s all over. The physical light captured on film is all that is left, a history of light preserved in chemical form, and I have to move on to the next one."

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Re: a safe way to remove paper curl and warp?


Hi guys,

I use the below method using regular window shade - works like a charm!

[url][sign in to see URL]

Regards,
Marcin
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