Re: Archival Inks for CMYK Proofing

[Holland StJohn <holland@rattlers.net>]

I have just started using the XG ink, slightly diluted, in my 1160. I
had switched to the 1160 after finding my 1270 turned orange. Anyway,
yesterday I did some quickie testing. I had found that 1270 prints put
in a plastic garbage bag filled with car exhaust faded in a few hours. I
did the same test yesterday with XG inks:

XG+Ilford Glossy showed no fading

XG+EPGPP,Polar Gloss, Konica QP or Epson Heavy Weight Matte all showed
marked magenta fade (prints turned green).

Epson Eom 1160 ink + EPGPP, Polar Gloss or Konica QP showed no fading.

While this testing is not very natural, it does suggest that the XG
magenta is more sensitive to car exhaust chemical than the Epson 1160
EOM ink.

It also suggests that the Gelatin based paper is an important part of
protecting ink from environmental gasses.

Holland

rafeb wrote:
> 
snip
>  However, its main selling point -- its archival
> properties -- are not proven or guaranteed for arbitrary
> paper types.
> 
> I find it interesting that Xg paper uses a gelatin surface.
> I wonder if the paper surface, as much as the ink, is
> responsible for Xg's presumed "archivalness?"
> 
> rafe b.
> 
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