Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "don2822003" <vk3yv@...> wrote:
>
> Hi all, Sodium Carbonate is sold quite cheaply as a swimming pool
> additive to raise pH in swimming pool water, also known as Soda Ash.
> The mixture I use is 7 grams to a liter of water. I use it with Riston
> sensitised  board which looks to be the same type of sensitising that
> has been discussed on this forum lately.
> Don VK3YV....

It's even easier to get than that.  Just go to the grocery and buy
a box of "washing soda" (usually produced by Arm & Hammer here) [1].
Also, there's a way you can produce it from baking soda by baking
it.

[1] I'm not talking about detergent, but washing soda.

Dave