In the 1860’s Charles Walker’s book “Electrotype Manipulation” ran into thirty editions. In 1868 Alexander Watt reported that;
‘Everyone has his set of electrotyping apparatus and his bath of copper sulphate. Even among the fair sex will be found many skilful manipulators and in such hands, how could the art fail to give beautiful results.’
Some earlier posts describe the processes of electro forming and electrotyping and the differences between them.
Examples of apples and pears that I have electroformed.
One of the things I like about etching aluminium with saline sulphate is the great depth of etch that it is possible to get. I’ve wasted an awful lot of research time trying to get the same depth of etch on aluminium with electro-etch. I’ve now found I can get the depth of etch I want by electro-etching mild steel, it takes a while but it is worth it.
The plate is about three times the thickness of the copper foil used by crafters, make registration for the second colour really difficult. I’ve had it through the press ten times and it seems to be holding out really well.
I made a silicon mold from one of my old plates, coated the inner surface with conductive paint and placed it as a cathode in an electrolytic cell using copper sulphate as an electrolyte. Copper formed on the inside of the mold making an exact copy of the original plate.
Some more prints from the current series.
The plates that these prints are made from started life as electro-etch test pieces. They are all made from electro-etched aluminium. It is a soft metal that etches deeply and in the areas of open bite provides a tooth that holds ink really well. Peter Wray, in his article on saline sulphate etching in Print Making Today, describes it as a natural aquatint. Although aluminium is soft the depth and quality of the etch achieved with electro-etch appears to hold out really well against the pressure of the press. I have plates that have been through the press thirty times with little effect on the quality of print obtained.
Managed to take thirty five prints from these electro-etched collaged (4 pieces) aluminium plates. I only needed twenty five for the 20 x 20 print exchange but the extras were needed to mitigate against producing twenty five mono-prints from the same plate. It didn’t work but it’s near enough! Not sure that I’m allowed ten artists proofs.
20 x 20 untitled