[chbot] chemical milling

[Mark Atherton]

Thanks Andrew,

The hydrogen peroxide/hydrochloric acid solution looks most interesting; never heard of it before.

My largest complaint back-in-the-day when using Ferric Chloride was the indelible orange-stain that the spills caused.

Anyway, I am looking into chemical-milling some thin copper sheet, and you may have solved one of the issues.

Just wondering about spraying a thin layer of paint on the copper. Removing the 'resist' using a laser cutter, then etching the remaining piece.

Anyone have any experience with a similar process ??

-Mark


> On 07 December 2020 at 09:14 Andrew Errington <erringtona at gmail.com> wrote:
> 
>     Ferric chloride is nasty, and becoming increasingly difficult to get.
> 
>     Try hydrogen peroxide and hydrochloric acid (or hydrogen peroxide and vinegar). Instructions on the web. I have tried it and it works.
> 
>     Andrew
> 
>     On Mon, 7 Dec 2020, 08:56 Marshland Engineering, < marshland at marshland.co.nz mailto:marshland at marshland.co.nz > wrote:
> 
>         > > Is this Ferric Chloride still available in NZ ?
> > 
> >         I have some ammonium persulfate but FC works at room temperature which makes
> >         it easier.
> > 
> >         Cheers Wallace
> > 
> > 
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