Digital BW, The Print

Good observation Paul. I'm jumping in a bit late here sorry but I do have a few observations on this. I have a seal 4460 which I have used to flatten the curl on paper but in all honesty I do not do that at all anymore.. Specifically it dries the paper out to much and it does it to fast which results in coating popping off.. so not the best way to go at least here.. I find that it is really important to keep a level of humidity in our stock thru out all processes..

Paul I'm surprised that your disenchanted with your D-roller .. sorry about that .. I just love mine but constructively may I add this.. Maybe this is splitting hairs but it really makes a difference here.. it's simply humidity.. I'm in an area that typically were down around 20 and in the winter when you turn the heat on it only gets worse.. The point is having material rolled causes a set to the material and if it's on a roll and the material doesn't have enough moisture or humidity the memory component is just exponentially worse. I see this on fine art papers and also canvas especially those with higher amounts of cotton.. 

To get a point across on this I have many and I do mean many small digital temp / humidity gages and I can stick one right in with the plastic bag the stock is in.. Try it sometime you'll be surprised.. Our stock needs to have some humidity so the fibers can relax.. I'm serious.. It's even better for your printers.. If your stock is humidified to the right level I think you'll find a much more positive situation.. The memory curl issue is still there but you'll find it not as overbearing as stock that is short of it's needed moisture.. I doooooooooooooooo use a D-roller and you'd have to pry it out of my cold dead fingers to take it...LOL.. I keep my stock in a small room that I control the humidity of.. and the boxes are opened and the plastic bags are opened to let the humidity in..  This is going to sound nuts to most of you .. but if your stock is kept at around 45/50% humidity you'll never see a head strike.. 

The biggest issue with something that is on the order of a D roller is having a place to really use it.. It takes a bit of room.. I have a large table in the studio I use.....  but a kitchen table is fine if it works.. I'm on several groups and oddly I have seen many posts where printers have hedged with the D roller.. mostly they don't want to pop the few hundred bucks I guess and opt for an alternate method .. I kinda just don't get it .. I can make a 40 x 60 print dead flat in a minute. 

Ok Ok  I'll stop...but my heart is in the right place..

jimbo

  ----- Original Message ----- 
  From: Paul Roark 
  To: DigitalB&WPrint 
  Sent: Thursday, November 07, 2013 12:02 PM
  Subject: Re: [Digital BW] Large size sheet paper


    

   Mark Sonners <mark@...> wrote:

      
    I use an old seal dry mounting press that heats up the curled paper cut from a roll and about 15 sec. at about 185 ...



  I've used that method with Arches.  The internal gelatin sizing probably helps with that paper.


  Do you find any increase in coating popping off or other defects?  (One of my latest failed experiments turned one of my very dark plain skies into a strarry night scene.)


  Paul
  www.PaulRoark.com  

  
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