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March 1998

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Subject:
Re: Microsection etching solution -Reply
From:
Fred Johnson <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 20 Mar 1998 19:26:00 +0000
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text/plain
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text/plain (41 lines) 
-stains the copper too much - stick with peroxide/ammonia

>>> COwEv <[log in to unmask]> 03/20/98 11:29am >>>
Hi

We use a solution of

Sodium dichromate - 10 g/l
Sulphuric acid - 100 ml / l

Swab etch for 10 seconds max. and rinse off.

Chris

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