Thanks Robin for the detailed information.
I am also interested in how to obtain high quality photo tools and on and
off have been testing over many years.
A couple of decades ago I also were testing with in my case 200W mercury
lights and I also removed the outer enclosure. Curiously I found that the
UV decreased which did not make sense. After some more testing I realized
that without the protective enclosure the tube ran too cold so the UV
dropped. Now I have 200W industrial UV exposure unit so there are no
exposure problems.
I did an artwork testing design to see resolution and performance on
difficult slightly angular lines. See:
http://www.vinland.com/USAF-1951.html Bertho
From: Robin Whittle Sent: Monday, July 02, 2012 05:31
Please see my previous message for a discussion of the desirable
properties of phototools, and about printing with a 1200 DPI laser
printer. In the future, I will place an updated version of this
material at:
.
http://www.firstpr.com.au/pcb-diy/----< snip
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