Re: Viscosity Color Etching with Akua Inks, anyone??
I have briefly tried the Akua intaglio inks and didn't like it at all. Too low viscosity and very easy to mess up everything because of the low viscosity. Those inks seem to work well for many printmakers, but personally I like more stiff inks. I probably have so strong touch when wiping the plates that I'm not able to control such fluid inks.
Charbonnel Aqua Wash is good stuff and I use it as my everyday ink. I really love the fact that they have large number of black inks that are really different, so there is something for every purpose. For viscosity printing you may need also their Aqua Wash oil and some magnesium carbonate powder to reduce or increase the ink viscosity, since the ink viscosity varies a lot between different colors. I use only blacks and sometimes their process colors, and the colors are much lower viscosity than the blacks.
In viscosity printing there might be fundamental problems when mixing those two, since you would have to print the stiff Aqua Wash first and then the fluid Akua, but Akua inks dry by absorption (solvent is drawn off to the paper fibres) and any Aqua Wash ink layer might prevent it from happening. It might work, but my gut feeling says that it won't work. The opposite order would work, i.e. print Akua first and then Aqua wash, but it would require heavy usage of modifiers.