According to Ed Huntress :

"Joseph Gwinn" wrote in message
...
In article ,
"Ed Huntress" wrote:

[ ... ]

How does it bite, compared to nitric? Does it undercut? Do you have to
etch
in multiple bites?

I've never used Nitric Acid for etching, so I cannot offer a comparison.

[ ... ]

Thanks. If anyone has compared it with nitric acid, I'd really like to know.

Well ... I've used both Nitric and FeCl for etching copper
printed circuit boards, and the nitric was far more vigorous -- easy to
overdo the task.

No Idea how either work on ferrous metals, however.

Enjoy,
DoN.
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