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Digital BW, The Print

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Changes to Epson Adv B&W output

2006-02-18 by Steve Kale

In December Epson updated the firmware for the 4800 and in early February Epson UK 
updated the driver.  This has caused an annoying drop in the performance I am getting 
from Epson Advanced B&W, namely a reduced dMax and a collpase in step separation in 
the very dark end of the scale.  Previously here is what the shadows looked like in my prior 
patch measurement for profiles:

90.00	1.524	20.01	0.32	0.98	-           L                 |a b                          +
91.00	1.556	19.15	0.40	1.01	-          L                  |a  b                         +
92.00	1.577	18.58	0.47	1.09	-          L                  |a  b                         +
93.00	1.589	18.27	0.51	1.14	-         L                   | a b                         +
94.00	1.616	17.55	0.58	1.13	-         L                   | a b                         +
95.00	1.630	17.19	0.61	1.12	-         L                   | a b                         +
96.00	1.653	16.63	0.61	1.13	-        L                    | a b                         +
97.00	1.666	16.30	0.58	1.11	-        L                    | a b                         +
98.00	1.692	15.65	0.58	1.00	-        L                    | a b                         +
99.00	1.698	15.51	0.55	0.96	-        L                    | ab                          +
100.00	1.718	15.04	0.50	0.91	-        L                    | ab                          +

It now looks like this:

90.00	1.595	18.10	0.24	0.47	-         L                   ab                            +
91.00	1.609	17.75	0.29	0.47	-         L                   |b                            +
92.00	1.631	17.18	0.30	0.42	-         L                   |b                            +
93.00	1.642	16.90	0.33	0.49	-         L                   |b                            +
94.00	1.655	16.57	0.35	0.47	-        L                    |b                            +
95.00	1.665	16.31	0.35	0.48	-        L                    |b                            +
96.00	1.667	16.26	0.31	0.50	-        L                    |ab                           +
97.00	1.677	16.03	0.28	0.47	-        L                    |b                            +
98.00	1.674	16.09	0.28	0.47	-        L                    |b                            +
99.00	1.678	16.01	0.26	0.45	-        L                    |b                            +
100.00	1.677	16.02	0.26	0.37	-        L                    |b                            +


Has anyone else noticed this sort of change?

Cheers

Steve

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