Homebrew PCBs

The 2 KW UV plate exposure machine is  a commercial type used in offset 
plate exposure. The lamp is a Philip halogen lamp enclosed in a simple 
reflector. Distance between plate and lamp is about 36".

Actually, for home hobby use, I believe there were discussions here on how 
to make a black light box. The black light flourescent lamp will give you 
the correct UV range to expose most photoresist materials. Using a simple 
box with glass top, black light, incorporate a vacuum pump (we use old 
discarded refrigerator compressor or even car aircon compressor), you can 
come up with a reasonably good exposure box though exposure time will be 
much longer.

----- Original Message ----- 
From: "Russell Shaw" <rjshaw@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, December 08, 2005 10:37 PM
Subject: Re: [Homebrew_PCBs] Presensitised PCB


> PPC wrote:
>> After lurking and learning quite a lot from many of you here, allow me to 
>> narrate my personal experience on how I make my very first PCB.
> ...
>
> Impressive exposure time of 5 seconds. Stronger than direct sunlight.
> How big is your 2kW UV light box? How much distance is there between
> the light and pcb? Is a reflector used? (i assume it's a HID lamp?)
>