[Alt-photo] Re: GUM: problematic yellow?

[Luciano Teghillo]

Hi Alberto,

I am resending this reply as it seems it did not go through.

So by looking at your modified jpg files, it looks like the magenta printing
time is 1.30 minutes (which I think also the color test shows), the blue
printing time is 3 minutes even if in the color test I would say 2 minutes
is good.

So I am confused. What is the best way to evaluate this printing time tests?

Luciano

PS. thanks for the files I downloaded them.



-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
Alberto Novo
Sent: Thursday, February 06, 2014 10:15 AM
To: alt-photo-process-list at lists.altphotolist.org
Subject: [Alt-photo] Re: GUM: problematic yellow?

Hi Luciano and Remko.
As for the examination of a scan, and particularly for that of a step wedge,
I first desaturate an then adjust the levels ("Alt" key + shift of the black
or white ruler in PS running on PC). For the best result, the scan should be
run without any automatic adjustment by the scanner. That is, levels from 0
to 255 anf gamma=1.
I have some examples of Luciano's scans corrected in this way in
www.albertonovo.it/teghillo/scan-yellow1_b.jpg (and also scan-yellow2_b.jpg,
scan-blue1_b.jpg, scan-magenta1_b.jpg and their psd equivalents if you like
to see how-to). 

Alberto 

www.facebook.com/alberto.novo.1
www.grupponamias.com
www.alternativephotography.com/wp/photographers/rodolfo-namias-group 

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