From: Paul Burridge
Subject: Re: UV Lightbox
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Date: Fri, 10 Jan 2003 13:52:51 +0000
NNTP-Posting-Date: Fri, 10 Jan 2003 15:20:34 GMT
Organization: Virgin Net Usenet Service
On Thu, 9 Jan 2003 22:07:15 -0000, "Paul King"
>I want to build a UV lightbox. Can anyone tell me where I can get
>"unguarded" fluorescent striplamps from (UK).
Save trouble and get yourself a Monarch platemaker. They're commonly
used in the print industry for making printing plates from negatives.
I use one for PCBs and you can't beat it. You basically place your
film of the PCB track over the light-sensitive side of the board,
place the two under the platemaker's hinged glass lid, fasten it and
hit the vacuum button. A gauge on the control panel shows air being
expelled and you can see the film becoming squashed totally flat
against the board as all the air between them is sucked out. When your
pre-determined pressure setting has been reached, you simply flip the
lid over to expose it to the UV source beneath and hit the timer
button. After your pre-determined exposure time has expired, the lid
automatically flips back over and (once the air pressure is restored)
you can unfasten the lid and your PCB is ready for developing. A
perfectly exposed, razor sharp pattern every time. You can pick 'em up
second hand for around 200 quid - often a lot less.
"What is now proved was once only imagin'd"
- William Blake, 1793