I can answer your second question-- You can buy liquid Ferric
chloride from your local Radio Shack stores. You can also
purchase larger quantity from say McMaster, for $20 per gallon.
FeCl3 is generally used to etch copper on printed circuit board.
The solution can be reused. You may also need to find out what is
a responsible way to dispose of this chemical.

Frankly, though, I don't understand why Ferric chloride can etch
stainless steel, because Fe and stainless steel are one and the
same element.

Patrick Cheung, research scientist   Xerox PARC, MS 35-1674
(O) 650-812-4338 (FAX) 650-812-4334   3333 Coyote Hill Road
[email protected]                  Palo Alto, CA 94304
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On Mon, 19 Oct 1998, Nick P. wrote:

Hi,

I have a question.

Did anyone ever etch stainless steele? I know Ferric Chloride is supposed
to work but at what concentration (i.e. FeCl3:H2O = ?) Do we need to add
anything else (i.e. HCl)?

And where can I buy Ferric Cholride from? Thanks.

Nick