I have no issue going the full distance on CMYK separations , that for me is the easy part.
Devils advocate now... you mention the carbon process as most likely the most archival... All of my research points out that the pigments whether carbon, gum and to the extent of hand pull gravures could use the same pigment sets, or it is possible to use very similar.
Carbon introduces a gelatin support , the others are slightly different and in what the pigments are being spread onto the paper with.
so with this in mind what different characteristics are in play that would make the gum pigment process less archival or even the ink pigment process less archival? Is there factors in place that I am not aware of?
Originally Posted by Hexavalent