Digital BW, The Print

You may have something there..
I am not really sure how it ends up shaking out.. The acrylic material itself changes over time.. I was of the understanding that acrylic over time becomes harder and more brittle and in that change process looses some amount of it properties of which UV protection is one of.  I can say that exposure to direct sunlight for extended periods actually change plastics very very quickly. 
This has been an interesting thread.. in that what has shown up is that basically all radiation is inherently harmful.. The solar system has three types.. UV, Visible light and infrared.. The shorter wave length radiation ( UV) does the most damage.. I for one didn't realize that regular light is also harmful.. 

jimbo







  ----- Original Message ----- 
  From: mrgs1001 
  To: DigitalBlackandWhiteThePrint@yahoogroups.com 
  Sent: Monday, August 30, 2010 7:49 PM
  Subject: [Digital BW] Re: no glass vs. glass vs. plexi: which shows carbon print at its best?


    
  I have been told a different version. Since the UV filter is built into the acrylic it is permanent but since it is just a coating on the glass it can be worn off over time depending on how aggressive the cleaning is. I suspect both are true, but I dont know which happens quicker.

  Cheers,
  Mark
  http://www.framedestination.com/

  --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "mrjimbo" 
  > JPlastics over time degrade and the UV additive in it along with it.. That is not the case with glass.



  

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