Creating a profile with Versaworks, i1Profiler & Babelcolor

[danjuan]

Hi

I'm using 3rd party inks with my Versacamm vs-640i, although prints are ok I find it impossible to match my screen colors.

Tools that I have at my disposal:
i1pro2
iprofiler,
Babelcolor Patch Patchtool (Trial)
Coloris (which uses Argyll CMS)

I understand I need to limit the single color inks first in Versaworks by printing a print chart with CMYK all at 100% and read it with the i1Pro2.

To read the chart I have been opening it up in iprofiler and selecting Measure Chart, I then choose 4 rows with 21 columns and read the chart and here's where I get stuck.

I understand that I need to get the highest Chroma values for CMYK which you can find in iprofiler or Babelcolor (If you save the file as a .cmxf file and load it into Babelcolor's Patch Tool), this I can do.. well if this is what you need to do.

I've also read once you get the highest Chroma value, you need to find the Density / Delta E, I don't understand this part.

I've read 2 ways of doing this, firstly ignore the highest Chroma value and just select the 100% swatch and go down the list until the delta E is around the 1.0. i.e. If I select the 100% swatch and go down I only get to 95% and the delta difference is 1.58

The second was to select the swatch with the highest Chroma value and then go down the swatches until the delta E is 1.0. i.e. the highest chroma value for C is 65% if I select the next one down, the delta is 1.54 difference.

To me the second option makes sense, if I select the highest Chroma values for CMYK I get (according to Babelcolor):

C: 65%
M: 55%
Y: 100% (seems strange)
K: 100% (again strange)

Any help would be appreciated.

Thanks

 

[Pauly]

Y and K you're suppose to limit the cluster at the end of the curve.

 

[danjuan]

Y and K you're supposed to limit the cluster at the end of the curve.

What does that mean? I'm only just getting started with color. I've been trying for so long and read a lot of posts/articles relating to it then I run out of time and have to move on to.

 

[Pauly]

you have to look at a dot plot. when the dots get close to near the end of the curve that's where you restrict it.
Or if the dots start bunching up and even if 1 dot goes backwards, that's where you restrict it.

 

[danjuan]

Hi Pauly

Please see attached my dot plot, what do you think?

Also in the linked video here:

It mentions to change to the density control only preset under the Quality tab / Color Management in Queue A when printing the patches generated with iProfiler for instance, should you use the density control only preset when printing the CMYK 0-100% patches?

 

[danjuan]

OK, so it turns out that it doesn;t matter about using the density control only preset at that stage as they print out exactly the same with using that or any other preset.

 

[danjuan]

OK

So leaving the levels as they were I limited the total ink to 200%, I then created 3600 patches in i1profiler and printed them using density mode, read the patches and created the profile (All done with CMYK).

Do I still leave the color management as density, it didn't mention on the video or on Roland's PDF in versaworks when I come to print?

Also, should I have profiled it in RGB as I keep seeing everyone recommends printing in RGB?

 

[timkaz227]

I just went through all of this with i1profiler w/ my Roland for the first time. After you have created your profile, select the color management setting of your choosing. 90% of the time I use U.S. Pre-Press. I find this works best for color matching. If I'm not trying to match colors but want a little more pop I'll use Max Impact or Sign & Display.

Also, Have you used your i1Profiler to calibrate your monitor?

 

[danjuan]

Hi timkaz227

Yes, calibrated the monitor with i1profiler.

As far as I'm aware, by selecting Max impact or U.S.Pre-Press you're ignoring the profile you've just created?