Digital BW, The Print

Paul,

The Hahnemuhle Problem was caused By the Type which they fixed a long time
ago..

Best
Jim Doyle


J.Doyle Enterprises L.L.C.
114 Old Orchard Rd.
Cherry Hill, NJ 08003
856-424-8660

http://stores.ebay.com/shadesofpaper




  -----Original Message-----
  From: Paul Roark [mailto:paul.roark@...]
  Sent: Saturday, September 11, 2004 3:23 PM
  To: DigitalB&WPrint
  Subject: [Digital BW] Yellowing of paper by antioxidants


  There have been occasional reports of PhotoRag being yellowed by tape on
the
  outside of packages and by the rubber clips that stop large format printer
  paper rolls from unrolling when not in use.



  I ran across this article, apparently by Mitsubishi Paper Mill that
  indicates antioxidants might be responsible for this yellowing.  The
  following are snips from this article.

  (See http://web.infoweb.ne.jp/mpm/inkjet/english/storage.html)







  "Materials of clear files contain plenty of antioxidants to prevent
  discoloration and deterioration by oxidization. Antioxidants contained in
  the film are diffused as vapor, although they are small in quantity. When
  inkjet papers are kept in a clear file, antioxidants diffused from the
clear
  file reach the surface of the inkjet papers. As the ink receptor layer of
an
  inkjet paper consists of fine particles, it has a large porous surface
area
  that easily absorbs chemical compounds. The antioxidants absorbed change
the
  color of the paper to yellow through air oxidation."



  .

  "Tape consists of a thin plastic film and glue, which generally contain
  antioxidants. Yellowing due to tape is caused by the same mechanism as
  yellowing due to storage in a file."



  "Rubber bands and rubber rolls contain antioxidants to prevent them from
  hardening during storage. Yellowing is caused by the same mechanism as
  yellowing due to storage in a file."



  Paul

  www.PaulRoark.com <http://www.paulroark.com/>







  [Non-text portions of this message have been removed]



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