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

----- Original Message -----
From: "Myc Holmes" <mycroft2152y@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, February 17, 2008 9:51 PM
Subject: Re: [Homebrew_PCBs] Re: Exposing Photoresist and Some Boards I have
built


>I thought the picture of the box was a little confusing, I had nver seen
> "Washing Soda" in the stores.
>
> They are totally different chemicals.
>
> Sodium Carbonate is an alakli, not as strong as Sodium Hydroxide (Caustic
> Soda).
>
> Sodium Bicarbonate is more of a buffer and is used to create CO2 in
> baking.

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

Leon
--
Leon Heller
Amateur radio call-sign G1HSM
Yaesu FT-817ND transceiver
Suzuki SV1000S motorcycle
leon355@...
http://www.geocities.com/leon_heller