Digital BW, The Print

Greg wrote:
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Ernst Dinkla
> <E.Dinkla@...> wrote:
>> Greg wrote:
>>
>> Greg,
>>
>> I'm busy calibrating Fibaprint Gloss F with a Spectrocam and 
>> do not get a higher Dmax than 1.94 with MIS UT PK on an Epson 
>> 9000. I do not see much difference between the Status T, A or 
>> E with this spectrometer. And the lowest L  is 11.80. With QTR 
>> I have to limit on 60 in the calibration strip as there's no D 
>> gain above that. Boosting doesn't help either. I have used the 
>> Premium Glossy Photo Paper setting in QTR but do not expect 
>> any difference with other settings and 1440 unidirectional.
>>
>> Any suggestions to get a higher Dmax ?
>>
> 
> The only thing I might suggest would be to see if you can find a way
> to make a pause between each pass. I found this through an error with
> my RIP long ago. If the print was still spooling, and had to wait for
> data, it would make a pass, and wait for data, then make another pass,
> etc. The density of black and color was better than I could get when
> it was printing at normal speed. But it's also been a very long time
> since I've messed around with a photo black ink and luster or gloss
> paper. I can't completely remember what I was getting for dmax, but
> I'm pretty sure is was under a Lab L=10, a value of 6-7 on a luster
> paper seems to ring a bell, but I'm not sure.

I quoted a wrong L number the 1.94 Dmax is10.84 L. Too low a 
density in my opinion.This printer is already way too slow to 
set longer pauses one way or another. I expected that the 9000 
would deliver enough density, it is alright with matte papers. 
Could be that the MIS PK pints that I received on Thursday are 
not delivering what I want.

> What do you get when you print the per channel limit/linearization
> chart from QTR (or any other RIP)? Just wondering if you are getting
> too much of a lighter shade mixed in to get a good dmax.

That happened with the boosting in the first curve creation. 
But the numbers I gave were of the calibration stepwedge 
before curve creation. Measuring it a day later the better 
Dmax went to the 55% step while it was on the 60% step after 
half an hour forced drying. Still around the 1.94 D number. I 
want to be above 2.1 at least.

Have to think this over.

Ernst




-- 

                    --
           Ernst Dinkla


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