Well, I've got something to tell about.
I've tried a lot of things but the colors were still not ok.
But at the end (late in the afternoon) there was a result.
I've cleaned the nozzles one more time and made another printout, which was ok.
Then I changed the Properties in Acoustica again, print quality set to Standard.
Suddenly the printout was ok, the colors were ok.
I changed again, print quality set to High.
In the printout there was a little green tone in the grey color.
So turned back to Standard.
Ok, then I wanted to print a label on a printable dvd.
First I set print quality to Standard.
It looked ok.
I had to make 6 prints on a dvd and so I did.
The first 2 dvd's were ok.
The third dvd, I saw a little green showed up into the grey color.
The 4th, 5th and 6th dvd had something green in it, but still bonly in the grey color.
So the mystery persists, but when I can keep this quality I can live with it.
The result will do for the moment.
Print quality set to Standard gave the best results.
The pictures I use for the label and the inlay for the case are printed not so big; so the difference in print quality High and Standard is hard to see.
I can deliver the dvd's to my customer, so I'm happy.
I will keep testing and I hope the results will get better in future, then I will let you know.
Greg, thank you for your support.
You were a great help.
Edu (VidiNova) de Rijck