From:  "Jim Hayes" <jimhayes@j...>
Date:  Wed Aug 22, 2001  6:44 am
Subject:  PDF thesis link: inkjet stability



I'm finding this 63 page thesis, written by someone from Colonge and 
done at the Image Permanance Institute (RIT) VERY informative. 
Although it is specifically about color inksets, there is a lot of 
good info on dye vs pigment, paper coatings and how ink is absorbed/ 
reflected affecting dmax, fade testing, limits of detecting fade by 
the human eye, more. It discusses carbon pigment inks, and alternate 
inks. It talks about how pigment inks have a harder time holding 
themselves in suspension than dyes, and why; also why pigment inks 
clog up printers more than dye inks but are more stable.

Three warnings: 1)The links gave me some problems in downloading, I 
had to retry a time or three; 2)Page 44 of the 300 dpi download had 
errors and I had to open up the 72 dpi version and print it out for 
this page. I suspect that this was the result of a bad transmission of 
the 300 dpi version. 3) The paper becomes highly technical in spots, 
with lots of chemical formulas and mathmatical formulas. But other 
parts of it are very clear to the layman, and informative.

Granted I'm only a third of the way through it.<g> Here is the URL to 
both a 300 and a 72 dpi download. They say the 72 dpi is only for 
viewing but I got it to print as I said above. There are a few b&w 
pics of things like their light fade setup at IPI and closeups of 
resin coated glossy paper surfaces vs matte coated surfaces that need 
the 300 dpi download I suspect(?):

http://www.geocities.com/mortenryhl/index.html

Jim H.

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Editor's comment: 
The link worked fine for me. I uploaded only the 72dpi file for quick reference, but as long as it is still available, you can try the 300dpi, which is about 2.5MB.

Antonis Ricos