Re: 6. RGB o CMYK profile conversions and max total ink
Re: 6. RGB o CMYK profile conversions and max total ink
- Subject: Re: 6. RGB o CMYK profile conversions and max total ink
- From: Rick Gordon <email@hidden>
- Date: Wed, 22 Oct 2003 10:23:02 -0700
Another factor I haven't seen mentioned here is Black Point Compensation. My experience is that with BPC enabled you may not quite reach the full TIL (but close) upon converting a r0,g0,b0 value, while with it disabled, you will.
Rick Gordon
P.S.: Greg, are you related to Tom Rettig, formerly of Broderbund Software, and son of Tommy Rettig of Lassie fame?
------------------
On 10/22/03 at 7:47 AM -0400, Greg Rettig wrote in a message entitled
"Re: 6. RGB o CMYK profile conversions and max total ink":
>
Hello Gariba,
>
Your profile maybe just fine. To check the profile and how it converts you need to create a RGB vignette in photoshop that has a range of 0 to 255RGB. Leave enough room at the 0 and 255 point to take a reading. The 0 end should come in at 360% and the 255 end should come in at 0% ink. You can then read further down the scale(vignette) and find the 320% number, most likely somewhere around 235-240 RGB. In other words, your scanner is setting the d-max low or the images you are scanning do not have very dense black.
>
A grey elephant on sandy beach won't produce a scan that ranges from white to black and you won't have any 360% ink limit any where in such an image. This vignette "grey scale" image should have equal amount of RGB through out and should appear grey on your screen and when proofed.
>
Greg Rettig
--
___________________________________________________
RICK GORDON
EMERALD VALLEY GRAPHICS AND CONSULTING
___________________________________________________
WWW:
http://www.shelterpub.com
_______________________________________________
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.