Hallo
I'm an avid listener and very occasional contributor to this forum with a particular interest in
carbon transfer and photogravure printing. I'm undertaking some research on the UV
wavelength sensitivity of photosensitive coatings and the 'blocking characteristics' of various
inks and ink sets.
In case it is of interest to practitioners, I show below three graphs of the UV transmission
characteristics of PhotoBlack, Magenta, Cyan and Yellow inks printed as a QTR calibration
on Pictorico TPF100 through an Epson 3800 using Ultrachrome K3 inks. I also show the
transmission graph for the un-inked Pictorico substrate. I was surprised by the high levels of
absorption at mid-300nm wavelengths of all the inks and I'm having fun trying to compare
apples and pears and relate these data with the results from X-rite 361T UV transmission
density measurements, also shown.
regards
Peter Moseley
(Please excuse the cross-posting on the Carbon and Alt-photo forums)
I'm an avid listener and very occasional contributor to this forum with a particular interest in
carbon transfer and photogravure printing. I'm undertaking some research on the UV
wavelength sensitivity of photosensitive coatings and the 'blocking characteristics' of various
inks and ink sets.
In case it is of interest to practitioners, I show below three graphs of the UV transmission
characteristics of PhotoBlack, Magenta, Cyan and Yellow inks printed as a QTR calibration
on Pictorico TPF100 through an Epson 3800 using Ultrachrome K3 inks. I also show the
transmission graph for the un-inked Pictorico substrate. I was surprised by the high levels of
absorption at mid-300nm wavelengths of all the inks and I'm having fun trying to compare
apples and pears and relate these data with the results from X-rite 361T UV transmission
density measurements, also shown.
regards
Peter Moseley
(Please excuse the cross-posting on the Carbon and Alt-photo forums)