Digital BW, The Print

Forgot to note that these data are from a post linearization scan  
from a 21 step wedge, so there is some gray overlap (darkest gray)   
that may affect the 100% reading.

Carl

On Oct 7, 2005, at 12:19 PM, Carl Schofield wrote:

> Paul,
>
> Here are some Lab data for the k7 black (100% patch):
>
> HPR (BW):  L 17.26    a 0.70    b 1.36
>
> Carl
>
>
> On Oct 7, 2005, at 11:26 AM, Paul Roark wrote:
>
>
>>> The k7 black does not have an outstanding dmax, ...
>>> Some values I've measured with the 4000 are:   Hahnemuhle Photo
>>> Rag Bright White 1.63, Hahnemuhle White Velvet 1.61, and
>>> Hahnemuhle Photo Rag 1.63 ...
>>>
>>>
>>
>> Aside from the low dmax, what is the tone of the black -- that is,
>> the full
>> RGB and Lab readings?
>>
>> If the dmax on PhotoRag is that low, I wonder what UltraSmooth/
>> PremierArt
>> looks like?
>>
>> Where the black affects the rest of the image most is from 90% to
>> 100%.  The
>> cross-over from neutral (or cool) to warm in that range has been a
>> tough
>> problem to deal with and still have a good dmax.  Luckily, the eye
>> is not
>> that sensitive to small tone changes in the deep shadows.
>>
>> My attempts to cool matte blacks with cyan have resulted in what I
>> consider
>> substandard dmax figures.  Actually, one attraction of the k3
>> approach to me
>> is that with a rip I can pour in cyan in the deep shadows and do
>> the best
>> job yet of reducing the cross-over.
>>
>> Paul
>> www.PaulRoark.com



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