Small dot in 0%

[maciej_w]

Hello, Is there a Roland DG specialist here?

I deal with color calibration of printing machines.
I had a problem with Roland's machines.
I've recently calibrated the SG2-300.
I created the profile as standard: create new media, template, linearization, ink limit and create iic profile with separate software.
After making the entire profile, dots for 0% appeared on the test printout.

I had the same situation with the LEJ-640 and sometimes with the RF-640, though occasionally
This only happens with the Rolands at Versaworks. Other software and printing machines does not have this problem.
I am also wondering about the different values in Fine tune Apply. Sometimes they suggest percentage coverage and then optical densities.

ICC profiles are generated in various programs: i1Profiler, Fiery Color Profiler and Color Tool HDM. Changing the GCR from 0% to 30% did not help.
I wonder where the error could be? the devices I calibrate are x-rite Isis, i1pro 1 and 2.
On the same day I was making an ICC profile on the same material and therefore VersaWorks 6.6.3 for RF-640 and this problem did not occur.

 

[Magnus59]

What is the rendering intent of the profile? If it's absolute colorimetric I would expect there to be a value in the 0% area as it is simulating the paper colour.

 

[maciej_w]

Yes I know. Relative colorimetric. I think this is a bug in the RIP

 

[aaronchan]

what version of ICC profile did you make?
if it was version 4, try version 2

 

[maciej_w]

Version 4. Do you think version 2 will be correct? It is very old.

 

[aaronchan]

Version 4. Do you think version 2 will be correct? It is very old.

have you try my solution?
And do you know what's the difference between v2 and v4?
If you can't even explain the difference, why bother to use a newer version?

 

[mihas]

Not all developers recognize v4, and for a small color gamut of printing inks, the difference between v2 and v4 does not matter at all, v4 is not needed. Although a solution is possible and not in the version of profile.