Loading ...
Sorry, an error occurred while loading the content.
 

Re: Optimal Roller Durometer

Expand Messages
  • kathryn_nyc
    Gerald, thank you -- I appreciate not only the data but a better understanding of why you would want a roller a bit harder or softer. It makes sense. Kathryn
    Message 1 of 3 , Jan 25, 2006
      Gerald, thank you -- I appreciate not only the data but a better
      understanding of why you would want a roller a bit harder or softer.
      It makes sense. Kathryn

      In PPLetterpress@yahoogroups.com, "Gerald Lange" <bieler@w...> wrote:
      >
      > Kathryn
      >
      > If I remember correctly the factory specified hardness for Vandercook
      > rollers is 20. If you were just using photopolymer plates you might
      > want to go a bit harder. I usually order rollers at 25 (for
      > photopolymer). As the rollers age (exposure to UV light, solvents)
      > they tend to get harder (though there is a dwell to the linearity). A
      > durometer gauge will reveal the progression over time.
      >
      > Photopolymer plates, if set up correctly (precision base, etc), are a
      > perfectly planar printing surface (sort of), and perform ink
      > acceptance and transfer better if everything else is perfectly flat,
      > cylinder packing, rollers. Softer rollers are better for irregular
      > printing surfaces such as worn type or photomechanical engravings with
      > poor base support.
      >
      > Gerald Lange
      > The Bieler Press
      > http://BielerPress.blogspot.com
      >
      >
      > --- In PPLetterpress@yahoogroups.com, "kathryn_nyc" <kj.clark@f...>
      wrote:
      > >
      > > Hello, I've searched through the postings and found a few postings
      > > from a couple of years ago on roller durometer (Feb 2002). So I have
      > > that information. What I did not see was any indication of the impact
      > > on printing from either plates or metal type with a roller that was
      > > A20 durometers vs. A25 vs. A35.
      > >
      > > Any insight as to the impact on printing or why you prefer one spec
      > > over the other would be appreciated. We are working with a Vandercook
      > > Universal III and will be printing from type and plates. Thank you in
      > > advance -- the postings I have read so far have been very helpful.
      > >
      > > Kathryn Clark, Rhinebeck, New York
      > >
      >
    Your message has been successfully submitted and would be delivered to recipients shortly.