Digital BW, The Print

Hi, Paul!

> >I will give the 51-step wedge a try. Can I use the one that is 
> >included with the Quadtone RIP Eye-One folder?
> 
> It's worth a try.  I recommend printing vertically and in the 
middle of the
> page.  Try to avoid any area that is going to be touched with a 
roller.
> 

The 51-step wedge might just be the answer.  I used the one that is 
in the eye-one folder and I believe the resulting ICC is better in 
terms of dark tones separation. I made an ICC from the carbon curve. 
Then I printed your grey gamma 2.2 21-step wedge using this ICC.

Here are the figures.

96.73	0.94	-0.44
92.77	1.21	1.14
88.23	1.56	2.86
83.90	1.88	4.38
80.10	2.07	5.42
75.68	2.35	6.34
71.21	2.54	6.91
66.93	2.69	7.26
62.71	2.78	7.53
58.27	2.92	7.50
53.77	2.90	7.36
48.58	2.74	6.74
43.84	2.50	5.84
39.09	2.20	4.19
34.31	1.92	2.63
29.58	1.56	1.46
25.83	1.16	1.10
22.95	1.17	1.13
19.54	0.83	0.88
17.02	0.72	0.38
16.35	0.60	0.18

Looks better to me. The separation between 95 and 100% is not big, 
but it is much better than before, and also the whole 90-100% range 
is better separated now. What do you think? Are these kinds of 
figures to be expected in the 90-100% range? Visually the new step 
wedge has better shadow separation, howver I still have a hard time 
distinguishing 95% and 100%.  

For the sake of completnesss I here include also the measurement of 
the 51-step wedge (with carbon curve applied), from which the ICC was 
made.

96.73	0.95	-0.41
94.84	0.98	0.23
92.62	1.07	1.05
91.22	1.26	1.61
89.68	1.39	2.24
87.99	1.50	2.87
86.86	1.68	3.35
85.26	1.73	3.94
84.32	1.86	4.24
82.84	1.94	4.59
80.87	2.03	5.11
79.76	2.11	5.41
78.60	2.20	5.64
77.70	2.18	5.83
76.57	2.32	6.09
74.96	2.40	6.36
73.52	2.46	6.61
71.99	2.58	6.85
70.50	2.63	6.98
68.56	2.56	7.13
67.52	2.72	7.23
66.01	2.72	7.20
64.51	2.81	7.47
63.43	2.85	7.39
62.31	2.87	7.35
60.96	2.84	7.40
59.80	2.89	7.38
58.79	2.90	7.35
57.39	2.93	7.35
56.13	2.94	7.27
54.02	2.90	7.12
52.55	2.86	6.97
50.89	2.85	6.73
49.32	2.73	6.39
47.54	2.62	6.12
46.04	2.59	5.78
44.44	2.51	5.45
42.99	2.44	5.22
41.14	2.32	4.53
39.38	2.30	3.92
37.70	2.27	3.52
36.05	2.11	3.05
33.98	1.92	2.52
31.49	1.78	1.93
29.19	1.55	1.43
27.40	1.50	1.24
23.83	1.28	1.21
20.88	1.16	0.92
18.07	0.85	0.66
16.88	0.63	0.42
16.48	0.53	0.26

Best regards

Didzis