Subject: Etching Brass

From: "Glenn A. Warr" <[email-masked]>
Date: 3 Nov 1995 15:28:48 GMT

Recently there was a posting about photoetching brass,  It was
stated that ferric chloride could be used as the etchant.  Could
someone please tell me what concentration of ferric chloride is
used for this process?  Also, if any one knows, is it possible to
use something as simple as permanent magic marker for the resist
with the ferric chloride process?

Thank you.

Glenn

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From: [email-masked] (J. Kimberlin)
Date: 3 Nov 1995 16:00:25 -0800

In article <[email-masked]>,
>with the ferric chloride process?

You use saturated ferric chloride at room temperature.  I have used India 
Ink for resist as well as masking tape for 1/4" wide traces.  It 
undercuts a bit but the thin copper goes away before the wide traces do.

JerryK

---

From: Andrew Mawson <[email-masked]>
Date: Fri, 03 Nov 1995 21:52:29 GMT

> with the ferric chloride process?

Glenn,

I've always used an almost saturated solution to good effect on 
copper pcbs.

I have in the past used 'Engineers Marking Blue' as a resist, but
it needs laying on very solidly to avoid pinholes.  Of course for
decorative brass the classic method is to dip the item in molten
wax, then scribe the pattern into the surface when cooled.
-- 
Andrew Mawson ------> [email-masked]
Bromley, Kent, UK. 0181-466-5582

---

From: [email-masked] (Rick Cook)
Date: 5 Nov 1995 16:48:58 GMT

Glenn A. Warr wrote:
> Also, if any one knows, is it possible to

Something as simple, but not a magic marker. Printers supply houses and bit
art supply houses sell resist pens that are loaded with resist. Just use
like a magic marker.

--RC

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From: [email-masked] (Andy Dingley)
Date: Mon, 06 Nov 1995 12:00:56 GMT

"Glenn A. Warr" <[email-masked]> wrote:

>stated that ferric chloride could be used as the etchant.  

I've never had any luck with ferric chloride. It works fine on PCBs,
but for engraving sheet I found it too slow at cutting the useful
stuff and so the resist started to pinhole. I switched to using an
ammonium persulphate based etchant and that was much better.
Unfortunately I've lost the recipe for it - has anyone else used it ?

--
Andy Dingley                          [email-masked]                                          

If all it takes is an infinite number of monkeys with typewriters, 
how come AOL haven't written any Shakespeare yet ?

---

From: "Glenn A. Warr" <[email-masked]>
Date: 7 Nov 1995 19:42:03 GMT

[email-masked] (James T. Bober) wrote:
>
> The best etchant I've found is based on perchloric acid and ceric
> perchlorate. It is available from GFS Chemicals in Columbus Ohio as
> product # 5910. Price is $25.50 for 4 liters.
> 
 Thanks Jim,

I always thought of perchloric acid as pretty nasty stuff.  Is this
etchant as nasty (especially around water)?  What is the recommended
procedure to neutralize the etchant once the brass has been
etched to satisfaction?

Glenn

---

From: [email-masked] (James T. Bober)
Date: Tue, 07 Nov 1995 10:09:11 -0500

Jim

In article <[email-masked]>, "Glenn A. Warr"

> with the ferric chloride process?

From Andrew Eicmann Wed Nov  8 10:56:58 EST 1995
Article: 19059 of rec.crafts.metalworking
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Subject: Where's the FAQ?
Date: 7 Nov 1995 15:08:23 GMT
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See question?

TIA