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Making blacks black
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Topic: Making blacks black (Read 14289 times)
ed_k
Jr. Member
Posts: 51
Making blacks black
«
on:
October 27, 2011, 04:21:28 PM »
When printing this image
http://ed-k-photo.smugmug.com/Other/HHPC-hall-prints/19733105_CpbQ8h#1552702480_GFJP3dt-A-LB
, the black sky prints mostly charcoal gray (with some areas of black - mostly outlining the bright fireworks). Qimage slide show & soft proof options show the image correctly (correctly as measured by what I see on my calibrated monitor during post). I get the same incorrect result using both the correct printer ICC as well as "Let printer manage...." and with several rendering intent options.
I suspect the answer is in the various rendering intent options. I've tried several and Relative + BP compensation get me closest with the black but then warm colors are off.
Epson 3800; never had any problems of any sort before. ??
Ideas? Suggestions?
TIA
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Terry-M
The Honourable Metric Mann
Forum Superhero
Posts: 3251
Re: Making blacks black
«
Reply #1 on:
October 27, 2011, 05:13:18 PM »
Hi Ed,
Looking at your image in Firefox with colour management on, the "black" at the top of the image varies from 2,2,2 on the LHS to around 28,28,28 on the RHS. I realise the image may have become altered in the process to post it but it may be worth clipping the dark end in Levels to obtain a more uniform black. Do this in the Qimage editor for easy changes.
Terry
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ed_k
Jr. Member
Posts: 51
Re: Making blacks black
«
Reply #2 on:
October 27, 2011, 05:59:35 PM »
Thanks, Terry.
I had noticed the areas of "almost" black and accepted them as being almost black - but a little lighter because of the nearby ambient fireworks light.
I was totally blown away when those blacks printed closer to middle gray.
Solved the problem by 1) doing a print head check (guess which one needed cleaned?) and 2) doubling down by making everything that was "almost" black 0,0,0. I'm sure that the clogged black (2 or 3 in fact) print heads were to blame.
Thanks again for your time & interest.
Ed
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Terry-M
The Honourable Metric Mann
Forum Superhero
Posts: 3251
Re: Making blacks black
«
Reply #3 on:
October 27, 2011, 09:05:28 PM »
Hi Ed,
Quote
Solved the problem by 1) doing a print head check (guess which one needed cleaned?)
It's a common problem that "wrong colour" is caused by blocked jets. It's not usually a black though!
Glad to hear the problem is solved.
Terry
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