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... Regards, Loris.
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