QTR-Quadtone RIP

I've got an Epson XP15000 printer that I've been able to test with. Its a bit

different than previous printers so its not exactly the latest reincarnation of

any previous model. While similar to 1430 in some respects - 6-ink Claria.

It uses different inks -- the usual CMYK but then instead of LC and LM it has

Gray (LK) and Red(R). Seems like this ought to make smoother B&;Ws since

it has the LK but then toning will be done with darker color inks. The blacks

are quite cold toned rather than warm toned like the UltraChrome inks.

Anyway, I have a version of QTR driver that works with this printer, but since Epson

has changed their communication protocols, there's more of a trial & error

guess method to making it work. All is mostly just fine but strangely the dot

sizes from the inkjets are unusual. It has the advertised 1.5pl drop but the

next larger drop is much larger (about 6pl) rather than about 2.5 to 3.5pl that

other printers have. This makes it possible to output much larger amounts

of ink. All printers have different sizes but this seems to be an outlier.

But QTR driver has always had INK LIMIT controls so this is easy to fine tune in curve

for any printer. (the .quad files have ink values that just need to be smaller).

This has nothing to do with number of jets.

I guess there's one potential issue here -- the 1.5 to 6pl jump might be a little

more likely to be visible. I don't believe this is a problem but who knows in rare cases.

Roy