Re: Posterization in a Press Profile?
Re: Posterization in a Press Profile?
- Subject: Re: Posterization in a Press Profile?
- From: Niall Coady <email@hidden>
- Date: Fri, 25 Sep 2009 15:31:07 +0100
- Thread-topic: Posterization in a Press Profile?
Hi Brian,
Please send us the measurement data please. I can look at this and tell you
what is what. I don't want to say what this is until we have more
information to hand.
If you can, please send all 15 separate, non averaged, data sets.
All the best
Niall Coady
Targetcolour Ltd
Thorncroft Manor
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Surrey
KT22 8JB
T 01372 700830
F 0870 751 8577
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W Http://www.targetcolour.com
W Http://www.mypressxpert.com
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On 25/09/2009 15:26, "Pylant, Brian" <email@hidden> wrote:
> Hello all-
>
> I'm trying to troubleshoot what I think is odd behavior on the part of a
> profile I measured from a press. I've been hearing from some of our designers
> that they are seeing some posterization in their images when they use this new
> profile. I've posted some of my test examples here:
>
> http://brainpilot.com/press_profile/profile_testing.html
>
> As you can see from the four images, when I take Bill Atkinson's LAB test
> image and a Granger rainbow and convert them to this press profile, there is a
> significant amount of posterization in the result. The same image converted to
> Web SWOP v2 or Gracol 2006 does not.
>
> I am unsure if this indicates a problem with the profile (either the file
> itself, how the target was read or the profile created), a problem with the
> press that the pressmen need to sort out, or simply the reality of what this
> press is capable of and the profile should be used as-is. This is my first
> attempt to profile the press, so I'm not sure if I've done something wrong.
>
> The press profile was created using the ECI2002 target. 15 sheets from across
> the press run were measured with an EyeOne Pro, averaged using ProfileMaker 5
> and then a profile generated using GCR2 and a TIL of 300%.
>
> Thanks in advance for any advice or insight!
>
> Brian
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