This is basically just an FYI post, I know it reads like an
advertisement but I have NO connection with the company except being
a happy customer.
If you are one of those people who use Photosensitive boards to
produce your PCBs, and you are using the 3M, Epson or other Inkjet
Transparency media to make films, (positive / negative).
You may want to take a look at this
(
http://screenprinters.net/product_group.php?gid=inkjetfilm ).
I have used this material with an old Epson Stylus 1160 and obtained
what I consider to be exceptional results compared to the other films
I have tried (also used with Stylus 660, results were not as good but
were useable). Unlike other films I have used which have a coating to
provide a tooth for the ink to bind to but take quite some time for
the ink to dry and allow for ink "pooling" causing non uniformity in
coverage, the coating on the film (above link) absorbs the ink almost
immediately. The coating acts as if it is some sort of gelatin which
soaks in the ink as it is laid onto the material.
My printer settings have been, Highest Density, Glossy Photo Paper,
High Speed = OFF, & whatever else I would normally use for a FINAL
Photo Quality Print.