Digital BW, The Print

I made a similar "de-roller"

Went to Office Max.  Bought a mailing tube and a laminated wall 
calendar.  Taped it on the tube.  Works great.  It really does not 
take much to reverse curl a sheet, but, if necessary, I find that I 
can vary the "de-rolling" by how long it stays rolled up.  Since much 
of my paper needs to be feed on the 3800 rear feeder, it is not a big 
deal.

Seems like many of the single sided papers have the curl problem.  
Probably due to the coating.  

Also, when I do dual sided contact sheets on (cheaper) matte paper, I 
need to "uncurl" a bit, as the drying ink seems to add bit of a curl, 
which would disappear if I waited for it to dry, but want to feed it 
back in fairly fast.

John 


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Antonis" 
<antonisphoto@...> wrote:
>
> Eugene,
> 
> if you haven't tried it already, consider this:
> 
> Use a cardboard tube of a fairly large diameter and of a length that
> is longer than your widest sheet by a good margin.
> 
> Tape a canvas, vinyl, or similar flexible but durable fabric so that
> if you rolled the tube it would wrap around it . The length of this
> fabric should be longer than your longest paper.
> 
> Unroll this on a flat table so that the fabric is flat on the table
> surface and the tube is attached on one end waiting to be rolled up.
> 
> Place your curled up paper so that it is snug up against the 
beginning
> of this fabric (near the tube end). The curled side should be facing
> down (against the direction in which the fabric will be rolled).
> Slowly, carefully, start rolling the fabric and paper together until
> all the paper has disappeared under the fabric.
> 
> Depending on the paper, the amount of curl, humidity etc -- you may
> have to use a bigger or smaller diameter tube.
> You may also have to let the paper sit for more or less time once 
it's
> rolled up.
> And you may still have to tweak the curl of the corners.
> 
> To control corner curl a safe option is to use the rounded edge of a
> table. Preferably an edge with a generous curve - 1" or more inches.
> Think of a 1" half round attached to the side of a work surface. 
> You sandwich the printing paper between two thin, clean sheets of
> ordinary paper and use your palms to run the corners of the sheet 
over
> the rounded edge of the work surface.
> 
> Sounds more involved than it is once you get past the first try.
> 
> I believe it is a safer and more effective way to uncurl papers than
> using a dry mount press at any temperature.
> 
> 
> Antonis
> 
> 
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "eappert"
> <appert@> wrote:
> >
> > Eric and Geoff,
> > 
> > Thank you very much for your help. I am dehumidifying my studio 
and 
> > manually uncurling paper stock. I have not been able to flatten 
Museo 
> > or Innova paper by cold pressing as I do with silver gelatine 
paper. 
> > Can you tell me if PK papers are altered by hot pressing and if 
not 
> > what temperatures can be applied safely?
> > 
> > Regards 
> > 
> > Eugene
> >
>