Re: Etchant types

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Article #16114

#16114

From: Don Montgomery
Date: Thu, 21 Jan 1993 00:43

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In sci.electronics, v064mb9k@ubvmsb.cc.buffalo.edu (NEIL GANDLER) writes:

>     What are the advantages of Ferric Chloride vs. Ammonium Persulphate.

I used to use a commercial Ammonium Persulfate etch.  It used a mercury
compound as a catalyst and mercury is pretty poisonous.  You might check
the -persulfate etch you're using to see if it contains mercury.

BTW, I was heating the etchant on the little lady's stove to speed the pro-
cess...the dish broke spilling the persulfate all over the chrome-plated
burner and instantly copper-plated it.   

Don Montgomery
donrm@sr.hp.com

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From: donrm@hpnmdla.sr.hp.com (Don Montgomery)
Date: Thu, 21 Jan 1993 00:43:46 GMT
Subject: Re: Etchant types
Message-ID: <7380107@hpnmdla.sr.hp.com>
Organization: Hewlett-Packard, Santa Rosa, CA
Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!sdd.hp.com!hpscit.sc.hp.com!hplextra!hpl-opus!hpnmdla!donrm
Newsgroups: sci.electronics
References: <C0vrzx.77p@acsu.buffalo.edu>
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