FeCl3 stains can be removed with dilute HCl. If you stain some
clothing, just soak in bucket of water with a "splash" of
concentrated HCl, leave overnight.
Ammonium persulphate does not fume, unless you add a strong base
like sodium hydroxide which will release the ammonium ion as
ammonia gas, and only then will smell. Kind of like how table
salt doesn't smell like chlorine gas even though it contains
chlorine atoms.
Adam
Neil wrote:
> Hi Marty,
>
> Interesting info. Thanks.
>
> Would you have any info relating to how clean the final etch is, and what
> minimum traces can be obtained by each of the options you mentioned. I've
> traditionally used FeCl, but just picked up some Ammonium Persulphate (MG
> Brand) but haven't tried it yet. Also, the ammonium fumes may be a problem
> so I'm not trying to get as much info as possible before I actually try it.
>
> Cheers,
> -Neil.
>
>
> On Thursday 22 May 2003 10:23, Marty Grove scribbled:
>
>><lots o' stuff>
>
>
>
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