Mike Chaney's Tech Corner
November 22, 2024, 08:33:43 PM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News: Qimage registration expired? New lifetime licenses are only $59.99!
 
   Home   Help Login Register  
Pages: [1]
  Print  
Author Topic: Making blacks black  (Read 14288 times)
ed_k
Jr. Member
**
Posts: 51


Email
« 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

Logged
Terry-M
The Honourable Metric Mann
Forum Superhero
*****
Posts: 3251



WWW
« 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
Logged
ed_k
Jr. Member
**
Posts: 51


Email
« 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
Logged
Terry-M
The Honourable Metric Mann
Forum Superhero
*****
Posts: 3251



WWW
« 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
Logged
Pages: [1]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!
Security updates 2022 by ddisoftware, Inc.