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Subject: Re: [Homebrew_PCBs] Re: Exposing Photoresist and Some Boards I have built

From: Philip Pemberton <ygroups@...>
Date: 2008-02-18

Leon wrote:
> 'Washing soda' (sodium carbonate) used to be very common in the UK, it was
> used with soap for washing clothes before detergents were invented.

So I've been told... I've been trying to track some down for ages (it's
apparently good for neutralising ferric chloride), but nobody seems to sell it
any more.

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