CMYK-to-CMYK Conversion by Printers (WAS Re: Color shift in PhotoShop 8)
CMYK-to-CMYK Conversion by Printers (WAS Re: Color shift in PhotoShop 8)
- Subject: CMYK-to-CMYK Conversion by Printers (WAS Re: Color shift in PhotoShop 8)
- From: Rick Gordon <email@hidden>
- Date: Fri, 22 Jul 2005 14:26:57 -0700
Comments inline below.
------------------
On 7/22/05 at 4:11 PM -0400, Roger Breton wrote in a message entitled
"Re: Color shift in PhotoShop 8":
>Rick, just out of curiosity, do you know a lot of you clients that carefullly craft their black printer?
------------------
I can't really say, as I'm a client rather than a printer. But I know that I will generally give it considerations in the following situations:
* Boosting black definition via curve steepening or channel-specific sharpening
* Accounting for image-specific variances in black generation for situations such as screen captures, ghosted images under text, CMYK quadtones, or other specific images which I might optimize to a non-default black generation
------------------
>>And what if there is no embedded profile? (Many people suggest not embedding a profile to avoid unwanted conversions.) Will you still convert, and if so, from WHAT assumed source profile?
>
>I assume US WebCoated SWOP v2 as the implicit Source unless instructed otherwise.
------------------
Probably, but it could very well be a Photoshop 5-style default, too, as it is often still recommended (particularly by those least likely to embed a profile)
------------------
>>How would you suggest a client communicate that he/she does NOT want this to happen, assuming they may not expect their files to be converted?
>
>How about supplying files in PDF/X1a? That's plenty specific to me.
------------------
I would tend to do that myself, but I think that many people are still unaware of that as an option.
------------------
>>I would hope you'd be proactively supplying every client with your profile and telling them to use it to create their CMYK.
>
>Aha! That's a big responsibility. That's assuming that us, the printers, can always hit right on our own profiles. What's your own hitting rate like?
------------------
It's not perfect, but it's sure helpful to know what separation workflow will work best. With printers that I've done major work with, I have profiled their wet proofer. In other cases, printers have said to supply them with U.S. Web Coated (SWOP) v2 separations, and I've done that. I will always ask for the printer's suggestions, but when they come back with the standard Photoshop 5 default settings without even calling it that, you have to wonder. If I have nothing to go on, I'll use U.S. Web Coated (SWOP) v2, figuring it as a de facto standard -- but I wish that a de facto standard would be developed that accounted for a range of black generation options.
What do any of you think of using the publicly available TR-004 profile suites as an alternative default? Any color balance issues?
------------------
--
___________________________________________________
RICK GORDON
EMERALD VALLEY GRAPHICS AND CONSULTING
___________________________________________________
WWW: http://www.shelterpub.com
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden