QTR-Quadtone RIP

Cheers Joe

you've just confirmed what I arrived at earlier this week. I have 
now produced the Ink Seperation Page for use with an X-Rite Pulse. I 
use Colorport to produce the target, then I seperated the target 
into 2 parts; firstly, the TID which I printout on a colour printer; 
and secondly, the ink seperation patches (6 x 21 step wedges) for 
use by QTR with my monochrome ink printer. Now I can read all the 
patches of the Ink Seperation Page in less than a minute, and enjoy 
the privilage of looking at the Lab values of the inks before I 
start creating curves. Also thanks to Winfried I also enjoy reading 
my various 21 step curve iterations in doule quick time. Again, 
thanks for your reply,

Jamie.

--- In QuadtoneRIP@yahoogroups.com, "koloshor" <koloshor@...> wrote:
>
> --- In QuadtoneRIP@...m, "Jamie Creed" <jlcreed@> wrote:
> >
> > I've referred to both of your work/files before I started this 
> > little project, and they were both very helpful and led to      
> > success 
> > in scanning the 21 step wedge with my Pulse setup.
> > 
> > Now I want to try and go 1 step further and try to scan the Ink 
> > limiting/curve creation targets in calibration mode with my     
> > Pulse 
> > setup. At the moment I do as you do Ernst and spot scan a random 
> > number of patch's which visually look close to the Ink Limits,   
> > but being able to scan all patchs in 1 swoop would be good use  
> > of my equipment and would enable me to monitor suppliers ink    
> > formulations for any variance and also keep an eye on the paper 
> > suppliers coatings, again for any variance in production batchs.
> >
> First, QTR targets are "weird". Only two of the three colors are
> actually used. If memory serves, the red channel is the density,
> 0-255. (you can check this easily in PhotoShop). I think the blue
> channel is the "ink selector". The selector is binary...
> 
> 1 = ink 1
> 2 = ink 2
> 4 = ink 3
> 8 = ink 4
> 16 = ink 5
> 32 = ink 6
> 64 = ink 7
> 128 = ink 8
> 
> If you want to do something like having equal parts of two inks, 
turn two channels on at the same time by adding their numbers.
The big question, are you using cyan, magenta, yellow, and black 
inks,or a pure monochrome set? The Pulse reads a strip at the top of 
the chart called the "Target ID", or TID, that's in an octal (base 
8) code of cyan, magenta, and yellow. The TID tells the pulse how 
many patches there are in each row, and on the chart, in total. 
The "Row ID" at the beginning of each row identifies the row number. 
The TID and RID need to be in the right colors. If you're using 
color inks, use a density of 128 and use the selectors to get the 
proper CMYKRGBW codes. You can't print them TID or RID with 
monochrome inks. So if you're using a monochrome inkset, you need to 
print a TID and RID on a color printer, at the proper size, and glue 
it over the monochrome chart.

Or make a chart for the color printer with just a TID and RID, no
patches, and a chart for the monochrome printer with just patches, no
TID or RID, and run the paper through both printers. Frankly, I find
cutouts easier.
> 
> Ciao!
> 
> Joe
>