Digital BW, The Print

pr_roark schreef:
>> ... 
>> The spectral curve (actually almost a straight line) runs 
>> from 86.40 at 380Nm to 99.50 at 750Nm, no drops, no hickups. ...
> 
> Do you have a Lab A and B for the paper white?  I assume the straight line response you're describing would indicate a very neutral reading for both.
> 
> Paul
> www.PaulRoark.com 
> 
> 
> 
> 

Paul,

Straight but inclining, high end to the right, so warmer.

Measured the 310gsm on a black tablet with the Spectrocam:

Lab 96.03  0.16 1.63

the 210gsm

Lab 95.87 0.02  0.80


There's a very rough page on my site with the paper white measurements 
of more papers. This should become a more sophisticated page when my 
youngest son has more time and it is hard to tell when that happens. 
More like Laszlo Pusztai's page. But I did measure more of the papers: 
A1 is the measurement on the print side and the paper put on a natural 
white matt board, A2 on the print side too but the paper on a black 
tablet, A3 the backside of the paper and the paper on a black tablet. 
All three are averaged numbers of 16 measurements in scan mode style. 
The differences tell something about where the OBAs are located, how 
opaque the paper is, etc.

http://www.pigment-print.com/spectrumplot/index.php


-- 
Met vriendelijke groeten,   Ernst


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