U of S | Mailing List Archive | alt-photo-process-l | Re: varnishes

Re: varnishes

15 Kasım 2008, Cumartesi, 9:30 pm tarihinde, Jon Lybrook yazmış:
> ... Oil based ink on cotton rag or alpha cellulose paper is essentially
> pH neutral anyway, isn't it? ...

Shouldn't be if it's the same oil (linseed oil) they use in oil
painting... But of course since it's a lot stiffer than regular oil paints
it should have much less oil. Anyway, the oil (and acid) is still there.
So, I wouldn't consider a photogravure print as archival as say a carbon
or gum print made with non-fugitive pigments. But probably the comparison
is moot - only a consideration for historians...