Homebrew PCBs

On 19/02/2012 15:57, Harvey White wrote:

>
> For the quantities of board I use, if I had access to good
> photosensitive board in the sizes I need, I'd use it. That is, if it
> were cheap enough. I can get (locally) single sided 0.23 inch PCB
> which is ideal for making double sided boards. For some reason, I
> seem to make double sided more than single sided.
>

Nearly all mine are single-sided.

> My problems in photoetch are not the developer, nor the exposure (made
> a vacuum frame and use an enlarger timer), but the density of the
> positive. Neither the laser nor the inkjet seem to do quite a good
> enough job so far. Exposure therefore is tricky. I do miss kodalith
> a lot.

As I've said several times, I get excellent positive transparencies with 
a cheap HP 9540 inkjet printer and JetStar Premium film.

Leon
-- 
Leon Heller
G1HSM