Was lucky enough to squeeze a couple of studio hours in this afternoon, between the chores, family stuff and general domestic flim-flam, so prepared a couple of small test plates for line work and aquatinting. I’m still getting a grip on how aquatinting works on zinc so this probably isn’t the best time to be experimenting with a new material, but there we are. And the aluminium does indeed feel and look very different to zinc when etched. It seems to take a lot longer to bite in the copper sulphate solution and the marks left around the particles of resin look very different too. Even the inking and wiping feels different and the weight and density of the plate in the hand. Odd how familiar one can get with (and attached to I suppose) the feel of a piece of metal.
The photos show the difference between pine resin aquatint on aluminium (top) and zinc (bottom).