>Is the MIS light blue toner (e.g. UT-TONER-PT-LB) just cyan + blue or is it already diluted according to your recommendation 25% pigments + 75% base?
It is a dilution that is matched to my Canon based 25% pigment, 75% clear base. The MIS version, however, uses their pigments. I don't know the exact formula for it. But I've printed with it using my profiles made for the Canon 25/75 blend, and it works fine.
>For PK you suggest 100%, 50%, 30%, 15%, 9% dilutions. How did you decide this progression?
For many papers, I can get a better dmax with a PK that is more dilute. So, the 50% worked well for that purpose. You just need to keep an eye on roller marks. If they appear, cut back on the dilution so that it dries enough be the time it reaches the exit rollers.
The normal dark to light ink dilution relationship is 30% dark ink, 75% clear base. So, the 15% is 30% of 50%, and the 9% is 30% of 30%. I think running two partitions is better than one. It staggers and hides the cross-overs better.
Paul