Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@y..., "Paul Roark" 
<paul.roark@v...> wrote:
> scrber [stephen.bate@m...] wrote:


Hi Paul, thanks for the feedback.

I double checked everything - everything seems fine.

All wedges were printed at the same time on one page, each as a 
different layer with the various curves applied so I agree that 
there can't be much off with the settings.

I really don't know what I am doing with the partioning of curves 
but I did play around with the green channel and yellow channel a 
little (for interest, after the warm curve is applied the images 
that have a great deal of tonal range in greyscale seem almost 
totally green - ie, very little partioning, I guess this would lead 
to a very flat print as it is only calling off one 'ink colour' from 
the hextone set right?)
Anyway, my tweaked curve gave a huge improvement - I know it won't 
be balanced or have the correct densities or anything but it did 
show me that the printer should be OK.  

As I say, the other work fine.  

I'll try your re-sent curve on Monday..

Thanks

Steve.












> >... MIS VM hextone set for the Epson 1290 (with Paul's new 
curves).
> >... printed the 21 step wedge on EAM and have found the following:
> 
> >cool : Nicely separated, seems very even and just what I'd expect.
> 
> >NC : as above
> 
> >Warm : yikes.  There is a huge separation between the 75 and 80
> >steps,...
> 
> That is where the steep toner curve starts.  Other 1290s seem to 
handle it
> well.  So, your machine might be slightly off or something in your 
settings
> may be different.  Before, tweaking the curve, I'd re-check the 
settings.
> 
> > There are no smooth graduations between midtones (all of
> >which seem extremely light) and the shadows - for sure this is 
not a
> >smooth ramp.
> 
> Now it is sounding like the cyan (main midtone) was missing.  Be 
sure to do
> a nozzle check.  However, if the cyan ink(s) are not firing right, 
none of
> the curves would print well.
> 
> I'd check the rest of the system before tweaking any curves.  
Also, I'll
> send you curves off list just in case the warm curve that MIS 
posted is
> corrupted.
> 
> 
> Paul
> http://www.PaulRoark.com