[alt-photo] Re: Gum Bichomate used as a resist for metal printing

[erie patsellis]

Polymerized, with dichromate, then etched in a copper sulfate/sodium chloride mordant 
works quite well with both zinc and aluminum. As to removing the gum, I don't bother, just 
ink it up and run it through the press, works fine and gives you just a hint of plate 
tone, which I prefer in my style of printmaking work.

erie

On 2/5/2011 10:24 AM, Michael Koch-Schulte wrote:
> I think that wouldn't work -- in traditional intaglio at least -- as the gum would 
> dissolve into the ferric chloride bath, both being soluble in water. Maybe air oxidation 
> would work on steel but that could take quite a while. Maybe using a pinch of nitric 
> acid in solution with something oily though. I've used gum arabic with nitric acid to 
> mask/etch litho stones which is a water-oil process.
>
> ~m
>
> On 2/5/2011 6:12 AM, Keith Gerling wrote:
>> Some years ago I remember seeing some links to some metal work.  I believe
>> the artist used gum to create a resist and then allowed corrosion to create
>> the image on steel.  Does anyone have these links bookmarked?
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