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Bug #11766

Faded blacks when soft proofing

Added by Jan Komarek 2 months ago. Updated 8 days ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
Darkroom
Start date:
10/11/2017
Due date:
% Done:

0%

Affected Version:
2.2.5
System:
Ubuntu
bitness:
64-bit
hardware architecture:
amd64/x86

Description

Hi,

I think there is a problem with soft proofing. The default profiles work okay, but actual printer profiles are missing black point compensation..? All pictures have heavily faded blacks when soft proofing with printer profile and it makes very hard to imagine how will the picture come out or how will the out-of-gammut colours change the picture since the soft proof looks so different.. All other programs I've ever used show black as black when soft proofing by default.

This topic has been touched on previously here, but never implemented:
https://redmine.darktable.com/issues/11304
https://redmine.darktable.com/issues/11204

Thank you for any help regarding this!!

PS: I tried to subscribe to dev. mailing list but was denied by mlmmj. Anyone knows why that is? No reason was provided, got offered confirmation first, but when I did confirm I got denied response..

Honza

History

#1 Updated by Aurélien PIERRE 8 days ago

That's normal, it actually means that the black point compensation is working.

Paper has a max contrast of 280:1 (B&W baryta paper). Your screen has at least 1000:1. In order to match the actual contrast of the paper, in softproof, you have to damp either the blacks or the whites. Photoshop acts the same when you check "simulate the black ink" : https://helpx.adobe.com/photoshop/using/proofing-colors.html

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