Re: Gum and Photogravure, was: varnishes
16 Kasım 2008, Pazar, 10:11 pm tarihinde, Loris Medici yazmış: > ... > On the other hand you used a nice description "...like a beetle in > amber...", since we know that they're beetles fossilized in amber as old > as millions of years, maybe there isn't much difference between amber and > gum (both being sap of their particular trees) so we can pretty be > confident that gum prints could be quite stable. No? Wikipedia article on amber says: "...A common misconception is that amber is made of tree sap; it is not. Sap is the fluid that circulates through a plant's vascular system, while resin is the semi-solid amorphous organic substance secreted in pockets and canals through epithelial cells of the plant..." So, eventually gum and amber are quite different. Regards, Loris.