Re: [Lcms-user] Problem with Printer on Network

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Hi Marti,

thanks for your reply. it seems that on the problem is not really =
dependant on the Network, connection, loacally the printer on these PCs, =
create same problem. I may have found the problem, on the PC that give =
bad results, there's a CAD software with color management. Everything is =
similar concerning the ICC profiles attached to devices on all PC. So I =
wonder if they don't bypass ICM like the Adobe Loader, I mean (directly =
changing the RGB values that are sent to the printer, according to the =
profile they use). To know this I will ask my customer to format the PC =
and test again. The problem with the probe profile is that I don't =
directly use ICC profile, but my own color profile engine for profile to =
profile conversion (that is tailored for my needs), I use LCMS for all =
other calculations concerning colors.

Regards

Armindo.
  ----- Original Message -----=20
  From: Marti=20
  To: Armindo ; lcm...@li...=20
  Sent: Friday, June 09, 2006 6:11 PM
  Subject: Re: [Lcms-user] Problem with Printer on Network

  Hi Armindo,

  Definitively, the display profile should NOT be taken into account. I =
don't know if anybody is doing that, but would be a very bad idea. Ok, =
good match to screen may be a goal for the big boys, but, at least for =
the iniciatives I've been involved, that is performed by defining =
suitable viewing conditions and a setup for the reference monitor, not =
taking each workstation monitor profile into account. Many large format =
printers are developed with network printing in mind, doing this hack =
would go against any color consistency and therefore be contra-producent =
for the bussiness. :-)

  I would bet instead for mixed output profile/intents used in each =
driver, and maybe double color management. Give a try to the probe =
profile, I assure you it would be worth of spent time.

  Regarding the tool to list used profiles, nothing like that on windows =
AFAIK.  Also, many applications do color management on their own, =
completely bypassing ICM.=20
  A RIP would be the ultimate solution if everything else fails, but =
those are not cheap...

  Regards
  Marti.

    ----- Original Message -----=20
    From: Armindo=20
    To: Marti ; lcm...@li...=20
    Sent: Thursday, June 08, 2006 5:11 PM
    Subject: Re: [Lcms-user] Problem with Printer on Network

    Hi Marti,

    Nice to ear you.

    The problem may come from photoshop or the Dosplay profile.
    Someone told me that to have a very close color between Display and =
print outputs, some printer manufacturer take in acount the display =
profile.
    Also this customer has photoshop on every PC and each PC has =
different monitors...
    Do you know what doesn photoshop do if you want to adjust the =
display settings (inside adobe product) ?

    Is there a tool that can list all the profiles used by a PC =
(monitor, scanner,  and each prodile used by each printer) ?

    thanks

    Armindo

      Hi Armindo, nice to talk with you again :-)

      >When I print some color patches on it from 5=20
      > different PCs, with EXACTLY the=20
      >same settings and same color profile,=20
      >I see some color difference on the printed results

      Ah, workflow problems. I strongly believe this=20
      is *the* real issue on today's color management.=20
      Double-color management, inconsistent paths,=20
      different profiles... a nightmare.

      Ok, I cannot spot where the problem is, but here=20
      are some clues. Thay have been very useful to=20
      me in past.

      1) Trust nothing. Check each driver, profile, etc. Even=20
      if the filename and UI look is same, maybe the=20
      profile and driver are different.

      2) pinpoint the path. This technique is very effective=20
      when one tries to find which profile/intent is being applied.

      ICC gives a "probe profile" here:

      http://www.color.org/probeprofile.html

      This is a fake profile that adds a  huge tint, which is of=20
      different color on depending on intent being used.=20
      So, just replace the output profile with this one and do=20
      some prints. If the workflow is configured correctly, every=20
      print should come with same tint color. I guess you will=20
      be surprised by results.

      3) Isolate wrong branches. If you have a=20
      colorimeter/spectrophotometer,  print some patches and
      measure them. Isolate the parts of the network that produces
      bad results. If the workflow is complex enough, maybe is not
      worth of understanding each step. Remember, you want good=20
      results. A proper setup would be nice, but you final goal are=20
      good results.

      Hope this helps

      Cheers,
      Marti.

      ----- Original Message -----=20
      From: Armindo=20
      To: lcm...@li...=20
      Sent: Tuesday, June 06, 2006 2:00 PM
      Subject: [Lcms-user] Problem with Printer on Network

      Hello,

      I don't know if somebody has already had this problem.

      I use a Canon  IP4200 printer shared on a Network.
      When I print some color patches on it from 5 different PCs, with =
EXACTLY the=20
      same settings and same color profile, I see some color difference =
on the printed results.
      Any idea of how to solve this ? All the PC run on Win2K with same =
driver version.

      Thanks

      Armindo

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Re: [Lcms-user] Problem with Printer on Network

An ICC-based CMM for color management

Re: [Lcms-user] Problem with Printer on Network