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Digital BW, The Print

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re: [Digital BW] H. Photo Rag 308 Sun Exposure Results

2002-03-15 by John Thompson

I had a customer complain about yellowing as well. 
The "culprit" was finally tracked down to be the wood burning stove his customer was using during colder days to supplement a central heating system. It was not venting correctly and...
It was the old take all the pictures down in the house and count the white squares behind them scenario.
 - JT

>>  After reading that one of our list members had some Hahnemuhle Photo 
  >>  Rag 308 yellow after just general interior ambient light exposure, I 
  >>  became worried that my prints might do the same. I even considered 
  >>  not using this paper.

  >>  So, I took a 16x20 sheet of H. PR 308 and cut it in half. My new home 
  >>  does not have a good south facing window so I did the next best 
  >>  thing. I placed 1/2 of the paper in the rear window of my car. (BTW, 
  >>  my car window does not have any special tiniting other than the 
  >>  German glass installed at the factory) It sat there for 30 days in 
  >>  the bright "hot" south Florida sun. It also made a 350 mile run to 
  >>  visit my son in Gainesville at the University of Florida and back (A 
  >>  very important fact!).

  >>  This morning I removed the paper and compared it to the half that I 
  >>  placed in a dark drawer and to a fresh sheet right out of the plastic 
  >>  bag.

  >>  The result was very interesting. No yellowing was visually evident, 
  >>  but what was obvious was a faint bleaching of the paper. The paper 
  >>  exposed to the sun was "whiter" than the control sheet.

  >>  No conclusion was drawn, I just thought some folks might find this 
  >>  interesting. I now have no concerns using this paper.

  >>  Mike



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