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Unless you are satisfied with the density of pigment provided by a one coating, you may risk the whole lot sliding of the support with multiple wettings - which can mean hours floating face-down on water. /rebates/2fwall-art2fmetal-prints&252fwall-art252fmetal-prints26tc3dbing-&idmpix&namempix&ra4. The exposure time is quite reasonable under bright sunlight or a UV table.Īnother potential problem is that multi-coloured gum prints need a separate exposure for each colour: you have to coat, expose, develop in water, dry and repeat the process. If the gum has no pigment, it dries to resemble a honey-coloured varnish. I don't understand the objection to adding pigment to gum - that's what the process was is about: it's other name was photo-aquatint, because watercolour pigments were added to the gum.

I have heard of artist's (eg Galina Manikova) making cyanotypes on glass - that is usually subbed with a thin layer of gelatin hardened by chrome alum or some other means, in order to make it accept the cyanotype coating. In analog photography, it is a chemical process carried out on metal salt-based prints, such as silver prints, iron-based prints ( cyanotype or Van. Copper is structurally stronger, harder, and has higher. This alloy can be used in harsh environments where pure copper is not feasible. Copper (CuNi2SiCr) is an alloyed copper material with excellent thermal and electrical conductivity. The process starts with metal powder, captured in a plastic binder (which makes it safe to handle filament on a spool), and then forms it into the part shape one layer at a time. In photography, toning is a method of altering the color of black-and-white photographs. 3D-printed copper provides strong mechanical properties with high thermal and electrical conductivity. I think the main problem would be finding a way to make sure the gum remained fixed to the support. A digitally sepia-toned image taken in 2011 of the Reina Sofia Museum in Madrid.