Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Hello,
I was interested in testing performance of various inkjet
printers and transparency print media. Since I have a HP 692,
Cannon S330, and Epson Stylus 660 inkjet printers plus various
brands of transparencies I should be able to make a start on
comparative testing.

From what I've learned so far is that a 60X microscope view of
the print through a incandescent back-light gives very good
details of the print, and clearly distinguishes differences
between printers (fitted only with genuine manufacture ink
cartridges), driver settings, and print media. I have been taking
digital photos through the microscope eye piece and the image
quality seems plenty high enough for this purpose. If anyone is
interested I will put some examples available online.

Now there is the question can a simple back-light images show how
well it can work as a photomask in UV photoresist exposure? An
improvement might be to replace the white light with a BLACKLIGHT
(long wave UV tube with visible light filter). Long wave UV is
the wavelengths photoresists are most sensitive too. anyone know
if digital cameras respond to these wavelengths ? If they don't
then a phosphor screen or translucent fluorescent colored film
could be placed directly on top of the print being tested. UV
light that hits the phosphor or fluorescent pigment will emit
visible light very closely as "seen" by photoresists during
exposure. Anyone know where to get some translucent fluorescent
colored film ?