"Don Pearce" wrote in message
...
On Fri, 6 Feb 2009 18:24:37 -0000, "TonyL"
wrote:

Arny Krueger wrote:
"TonyL" wrote in message
...

One way is to make a transparency and use that to mask a board
coated with an emulsion then exposed to UV and develop. Then etch
in the normal way.


That looks the most likely option for me.

UV boxes start at around 70 UKP, though. Surely they are just boxes
with UV bulbs and maybe a timer. Any reason I can't make my own box
and buy a replacement UV bulb or two ?

Isn't the old light-sensitive resist still around?


I've never seen that. I would imagine handling while keeping it out of the
light would be inconvenient.

It wasn't all that sensitive.

Radiospares used to do UV sensitive double sided board. It was covered
with black plastic, which you could use as a resist if you fancied
just cutting the pattern with a scalpel. No idea if they still stock
it.

Seems like UV is the more modern approach. Plenty of that around as long as
the Sun is shining.