Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Leon Heller" 
<leon_heller@h...> wrote:

 
> I use it all the time without any problems.
> 
> Ordinary glass is OK with the long-wave UV used for PCB exposure. 
I use a 13
> minute exposure, but have quite a large distance from the tubes. 
Your
> exposure should be much less.
> 
> 

Heelo you wonderfull people

I am pleased to anounce that I have had sucess, a fully exposed, 
developed and etched board.

To all those people who said less exposure time .. you were right.

You see I have made many boards before on proffesinal equipment but 
never with my own home made gear. I never had to work out exposure 
times, development times etc.. they were allways known by someone 
and using a "made from bits and peices laying around the house" 
exposure unit I could not be sure of times for exposure, I naturaly 
assumed by using blacklights it would take a lot longer and 
devlopment would be slow with hobby type chemicals.

Amazingly the exposure time was about 1 min

Development a staggering 30-45 seconds

Etching about 20 mins at 20°C no bubbles just swishing the solution 
over the board.

Maybe these chemicals/boards are far better than the ones I have 
used before (it has been over 10 years). 

Thankyou all for your help, I do appreciate it and thanks for your 
patience with a newbie.

At least someone else may in the future benifit from my experience 
while searching through this forum, and more importanly benifit from 
the good people that submit helpfull advice to others

Kind Regards

Tbone