• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: Re: Is this a scum dot?
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Re: Is this a scum dot?

  • Subject: Re: Re: Is this a scum dot?
  • From: Sloan Simpson <email@hidden>
  • Date: Tue, 12 Nov 2002 14:18:05 -0500 (EST)
>We did find that the dots were lessened when trashing
Photoshop's and ColorBlind's preferences.<

At which stage, just before starting a new profile? Can an existing profile with this problem be corrected somehow in edit, or should I restart from scratch?

Thanks,
Sloan Simpson


-------Original Message-------
From: Marc Aguilera <email@hidden>
Sent: 11/12/02 01:44 PM
To: "Brodie, Robert" <email@hidden>, "colorsync users group
(E-mail)" <email@hidden>
Subject: Re: Is this a scum dot?

> Steven Kornreich wrote:

>> I create all my printer profiles using ProfileMaker 4.1. After creating my
>> CMYK profile, I setup PhotoShop and select this profile as the cmyk
>> profile. Now here is my question. How do I get 0% dot. ? If I spec white in
>> PS rgb 255 PS says in CMYK that I am getting 6c, 2m, 1y..How do I get it to
>> all "0"

Robert Brodie Wrote:

> I had the same problem, discovered that each CMM in photoshop
> changes the CMYK white value by various ammounts. I now use Apple CMM which
> gives me 0% in all channels. Heidelberg seemed to be the worst for me. If
> anyone can explain why the CMM would change these values I would be
> interested to hear.

Yes, some call it SCUM dot. I have not seen this with Gretag CMYK profiles.
ColorBlind changed its core engine when rendering data RGB to XYZ to L*a*b*.
It was discovered that some equations yielded dots and others did not with
various CMMs. We did find that the dots were lessened when trashing
Photoshop's and ColorBlind's preferences.

Marc Aguilera
ColorCritical
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.
  • Prev by Date: Re: Is this a scum dot?
  • Next by Date: Re: Attack of the Spyders. Oh My!
  • Previous by thread: display profiles with profilemaker
  • Next by thread: Re: Is this a scum dot?
  • Index(es):
    • Date
    • Thread