Digital BW, The Print

Here is the measurement data for the linearization function of my "neutral"
ISP curve.  You can see even with 36/54 I had trouble cooling the midtones.
If I went further I think the highlights would have gone too cold.  Rightly
or wrongly I am focusing on the Lab a values (as I think that is what Paul
focuses on when mixing his inks).



SampleID    SAMPLE_NAME    GRAY    XYZ_X    XYZ_Y    XYZ_Z    LAB_L    LAB_A
LAB_B


BEGIN_DATA

1    A1    0.00    87.96    91.15    82.21    96.47    0.13    -5.86

2    B1    5.00    77.03    79.88    70.84    91.63    0.02    -4.53

3    C1    10.00    67.97    70.39    62.16    87.19    0.23    -4.09

4    D1    15.00    59.34    61.35    53.84    82.57    0.44    -3.54

5    E1    20.00    51.47    53.14    46.42    77.96    0.61    -3.12

6    F1    25.00    44.89    46.28    40.14    73.72    0.77    -2.61

7    G1    30.00    38.41    39.53    34.04    69.14    0.94    -2.11

8    H1    35.00    32.73    33.62    28.74    64.66    1.11    -1.67

9    I1    40.00    27.84    28.54    24.24    60.37    1.27    -1.28

10    J1    45.00    24.06    24.63    20.94    56.71    1.38    -1.27

11    K1    50.00    20.26    20.70    17.60    52.62    1.51    -1.21

12    L1    55.00    16.55    16.88    14.38    48.11    1.57    -1.20

13    M1    60.00    13.12    13.37    11.46    43.31    1.54    -1.33

14    N1    65.00    10.13    10.31    8.90    38.40    1.43    -1.43

15    O1    70.00    7.63    7.77    6.79    33.50    1.28    -1.66

16    P1    75.00    5.31    5.42    4.79    27.89    1.05    -1.77

17    Q1    80.00    3.56    3.63    3.25    22.42    0.86    -1.82

18    R1    85.00    2.27    2.32    2.11    17.10    0.72    -1.86

19    S1    90.00    1.40    1.43    1.33    12.17    0.47    -1.90

20    T1    95.00    0.81    0.83    0.78    7.50    0.31    -1.84

21    U1    100.00    0.45    0.46    0.43    4.15    0.19    -0.95

END_DATA




> From: Steve Kale <stevekale@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Mon, 21 Feb 2005 21:03:01 +0000
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: Re: [Digital BW]  QTR neutral curve PKN, UT7 Light warm/cool grey
> 
> 
> I swear I must just have different ink or something.  My Gray Value for
> 45/45 was 40 when I think yours is down at 20.  I am really beginning to
> wonder if MIS have any QC or perhaps we are just doing something completely
> differently.  I print the calib page with the ink limits set and then
> measure the 100 patch on the combo and find the interpolated "% black".
> 
> 
>> From: Carl Schofield <scho@...>
>> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
>> Date: Mon, 21 Feb 2005 15:47:53 -0500
>> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
>> Subject: Re: [Digital BW]  QTR neutral curve PKN, UT7 Light warm/cool grey
>> 
>> 
>> Steve,
>> 
>> I printed your calib page with the profile I posted (on both Ilford
>> Smooth Pearl and  Kirkland Glossy) and here are the comparable data to
>> what you just posted:
>> 
>> Kirkland Glossy:
>> LM/LC at 45/45 LK 10 (glop)
>> 50% patch L 61.0, a 0.7, b -2.0
>> 100% patch L 43.3, a 1.3, b -1.9
>> 
>> Ilford Smooth Pearl:
>> LM/LC at 45/45 LK 10 (glop)
>> 50% patch L 61.9, a 0.9, b -1.9
>> 100% patch L 44.3, a 1.4, b -2.0
>> 
>> 
>> Quite different from your results - are you using the UT7 LM and LC
>> gray ink?  Note that I did not edit the LK curve in the cal .quad file
>> so glop (LK) was applied in the combo print (LK/LM/LC).
>> 
>> Carl
>> 
>> On Feb 21, 2005, at 1:32 PM, Steve Kale wrote: