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Optical Brighteners in Inkjet Papers

2002-04-09 by Robert Morrison

After the latest debate about whether Photo Rag has OB's or not...I
purchased a black light (with a SB-4W bulb).

I turned out the lights in my studio and turned on the UV bulb.  The
following comments are based on examining both sides of the paper.  For
coated one side papers this tells you whether the OB's are in the paper or
in the coating.  If the coating side glows and the back side is dark then
the OB's are in the coating.  If both sides are the same then the OB's are
in the paper.

EAM--Strong glow in the coating
Photo Rag--Strong glow in the paper
Orwell (German Etching)--Strong glow in the paper
Wells River (William Turner)--No glow in either paper or coating
Museo--No glow in either paper or coating
Eclipse Satine Soft White--No glow in either paper or coating

Its important to note that the glow coming off of the Photo Rag and German
etching is nearly as strong as the glow coming off the EAM.  From my own
fade testing, EAM and Orwell both yellow very quickly when exposed to full
sun in a window...this is most likely due to the OB's burning off.

If you saw what I did tonight...your mind would be made up.  EAM, Photo Rag
and German Etching have OB's in them...William Turner, Museo and Eclipse
Satine Soft White do not.

EAM was from Altex, Photo Rag, Museo and Eclipse were from photoinkjet.com,
Orwell and Wells River were from inkjetmall.com.

As some of you know I have a very large collection of paper.  If there is
another paper that you are curious about, email me...if I have it I'll test
it for you.

Robert  

----------------------
Robert Morrison
rmorrison@...

310-397-2704

4131 Bledsoe Ave.
Los Angeles, CA 90066

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