Digital BW, The Print

I may as well give QTR a go for this, and compare it to the Epson
driver. The thing about using a clear coat is that it is easy to see
if any other ink is firing. Apart from the colour, if anything else is
present in trace amounts you can see the dots under a strong loupe. I
can also compare the Epson driver results with the OPM results - which
certainly have only one channel in use. I hadn't expected the
theoretical RGB values for LM to work because of the 'impurity'
(departure from true magenta) of the ink (ie I had expected the driver
to account for the impurity), but it does seem that if you switch all
colour management off you will get just the LM for 255,126,255.

Whichever way I use it, this is a lot easier and more consistent than
using a spray gun. We were going to experiment with Eco Printshield,
and we approached Premier for advice, but they didn't reply to our
request.

Best,
Helen

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Shilesh Jani"
<shileshjani@b...> wrote:
>
> Helen,
> 
> I cannot comment on IJC/OPM -never used it. Over the Epson driver, 
> the advantage of my QTR method is that only the chosen channel will 
> fire. We don't know how the Epson driver works, so there is no 
> telling which color values will fire only one channel.
> 
...