Re: Etching phosphor bronze

Dirk Bruere at Neopax wrote:
>
> Uncle Al wrote:
> > Dirk Bruere at Neopax wrote:
> >
> >>Dil. Nitric, or is there anything better?
> >>Mainly for 'artistic' work.
> >>As resist, wax? Beeswax?
> >
> >
> > Depends. For shallow etch cheap Krylon spray paint is a good resist.
> > Remove with halognated, ketone, or ester solvents. Dilute nitric will
> > chew on it, so will ferric chloride or an electrochemical etch
> > (electromachining). Remember that bronze is copper plus tin. The
> > copper will go but the tin will become tin oxide in an oxidizing
> > environment - and that is rather resistant to dissolution. It can
> > shield underlying metal.
> >
> > There are books on this stuff.
> >
> Maybe zapping it with laser is the better way to go, from AutoCad files...

A 10 watt CO2 laser scriber that mounts like a USB printer is
available for $8K. Cuts 1/4" deep. Compatible with Photoshop, any
word processor, and CAD software. (Emission of a visible plume is
EPA-punishable by up to $10K/incident-day fines plus harrassment).

http://www.versalaser.com/

Or 3-D print it,

http://www.bathsheba.com/

in porous stainless steel or infiltrated with molten bronze.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
.

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