Homebrew PCBs

G'Day Andrew

As you mentioned Canberra, could you tell me your source for the peroxide? 
I have no problem locating the acid, coutesy of swimming pool shops and 
hardware outlets but I have yet to embark on the search for a good source of 
peroxide in Oz.

Thanks

Bill

----- Original Message ----- 
From: "Andrew" <andrewm1973@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Wednesday, June 07, 2006 8:50 AM
Subject: [Homebrew_PCBs] Re: Ammonium Persulphate


>> > andrewm wrote:
>> > HOWEVER - if you only etch one board in a
>> > blue moon - Amonia Persulphate or FeCl are
>> > probably better ideas.
>
>> ST wrote:
>> I wouldn't even be sure of that.
>> There's no disadvantage of CuCl that i can
>> see, so why would the others be better?
>>
>> As long as you have enough spare space to
>> store your tank and two bottles  of
>> regenerating chemicals it really seems a
>> good etchant. Of course if one can get the
>> other etchants easier....
>
> It takes some time to make.
> It takes some time to look after before use.
> As you pointed out it takes some space.
> Vapours from it can wreak things.
> It does not etch as well as FeCl in an air
>    agitated tank.  (line resolution)
> You can't see the board like Amonia
>    Persulphate. (which may be good thing if
>    you only do a few boards and are not too
>    familiar with etching)
> Your neighbours look at you funny and call
>    the anti-terrorisim hotline when you are
>    using it outside.
>
> There will be some point where it is more
> sensible to mix up disposable etchant and
> then dispose of it.
>
> That point might be one board in six months.
> That point might be one board in two years.
>
> I dont know where that point is - but it
> will be somewhere.
>
> For me - I am well above the point where CuCl
> is a good idea and I love it very much (and
> may marry it if Canberra changed the laws)
>
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