Digital BW, The Print

When I print color with my 4800, I just use the Atkinson profiles. I 
never have messed with colorbase. 

The Atkinson profiles are the best profiles I've used. They are spot 
on.

Though I'm not sure if he has matte profiles yet for the 4800.

Scott

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Olivier" 
<odesmais@y...> wrote:
>
> While this is a B/W group I have seen some have tested and 
discussed 
> Colorbase.
> 
> I have been trying to run it with mixed results. I run it with a 
> Pulse spectro and custom-profiles made with the same package.
> 
> On USFA I got fairly good results and no issue (that I can 
> identify...). 
> 
> Oppositely on Archival Matte with the proper driver settings the 
> results are below expectations not to say puzzling. With CB not 
> activated and a custom profile with no clb, the print is pretty 
good. 
> With CB clb file activated and a custom profile made with clb 
> activated the result is poor : on a portrait I often use for 
profile 
> assessment, the skin is reddish and bluish. At visualising the 
> profiles, the one made with no clb looks smooth evenly distributed. 
> Oppositely the one made with the clb file shows a very 
strange "leg" 
> at about L* 20-25 in the +a-b area. I have processed (re-print, re-
> mesured) the target(s) many times also having the same profile and 
> the same output. Of course the output does not match the screen 
> softproof (2070SB Optix-profiled). This +a-b "leg" is very 
puzzling : 
> I have never identified it in the past on a 1800 (but it uses 
another 
> ink set) and it does not exist without clb activated.
> 
> One major drawback I find in CB is that there is no way (that I've 
> found so far) to visualise the measurement of the clb print target 
> oppositely to profile visualisations that are widely available(no 
> delta, no graph... nothing). From the Pulse experience, I have 
often 
> come across wrong measurement that are not explainable. But at 
least 
> one can delete and re-process knowing the profiling has failed. 
This 
> being said, various measurements, and profile creations come to the 
> same "bad" result.
> 
> So questions :
> - Has anyone came across the same situation (CB activate, cutom 
> profile with the clb, Archival Matte-EEM) of a aditional gamut in 
the 
> shadow in the +a-b area.
> - Has anyone found a way of assessing the clb files.
> 
> PS : to Steve Kale
> I now suspect why Epson recommends not to cut USFA with the in-
built 
> cutter. The issue is not the thickness of the paper though it is 
very 
> thick and getting the cutter dull soon. The issue is that the cut 
> creates a lot of particules-dust...that the printer should not be 
too 
> happy with. USFA is a nice paper, but the other thing one has to 
deal 
> with, in case of roll-cutting, is the curl of the paper : it is 
> simply aweful. I have not yet find a way to deal with it without 
> damaging the surface of the paper which extremely fragile.
> 
> Olivier
>