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

From: Derryck Croker <derryck@...>
Date: 2008-02-19

On 18 Feb 2008, at 21:47, Philip Pemberton wrote:

> 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.

Sodium Carbonate Decahydrate on sale in the local Sainsbury's
supermarket - "Washing Soda". I use it to soften the water a little, =
less soap powder.

--

Cheers

Derryck