Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "Kamal Shankar" <kbshankar2000@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, June 26, 2007 2:28 AM
Subject: Re: [Homebrew_PCBs] Etching Tips and Tricks


>> I use a similar technique (the etchant is deeper,
>> though), and my boards
>> take less than 10 minutes to etch. Have you got the
>> right concentration for
>> the FeCl3?
>
> A question I have been dreading - right concentration
> !
>
> As I mentioned.. I am using a commercial grade, and by
> that I think the retailer meant it has as much FeCl3
> as everything else...
>
> Is that a wrong thought ?
>
> But I still mix about a table spoon in 250ml of hot
> water.

That is nowhere near concentrated enough!

>
> Also.. does the depth of the etchant matter ?

Not really, I just like to have plenty of it.

Leon