On Wed, 05 Jun 2013 14:17:56 +0100, you wrote:

>Seeking opinions and experiences on the relative merits of these two=20
>substances, for the purposes of etching UV-sensitised prototype copper PCB=
s.
>
>Thanks!
>Matt

Sodium metasilicate is a developer, not an etchant

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.