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Digital BW, The Print

Index last updated: 2026-04-28 22:56 UTC

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Re: Carbon-6 & 7800 update

2009-12-28 by pr_roark

(Re-post/correction) 

I've posted some print tone information for the 7800 - Carbon/Eboni-6
combination. See http://www.paulroark.com/BW-Info/C6-7800-tones.jpg The graph is of Lab B values for 21-step test strips. Lab B is the main variable, Lab A being set by the paper and not varying much within the print.

Note how similarly H. Photo Rag and Premier Art Generations Alise Natural print. HPR had a slightly higher Lab A, and PA Gen. Alise had a higher dmax.

(In the original post I noted cooler spectro readings for the Epson driver at 1440 v. 2880.  This difference, however, appears to have been from a difference of paper batches or some other source.  I could not duplicate the results on the same piece of paper and measured at the same time.)

Paul
www.PaulRoark.com

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