Re: X-Rite ColorMunki experience
Re: X-Rite ColorMunki experience
- Subject: Re: X-Rite ColorMunki experience
- From: ColorBurst Systems <email@hidden>
- Date: Thu, 08 May 2008 16:33:11 -0400
Hello John,
The critical key about supporting Transparencies is that the Language
of PostScript Level 3 pre-dates Transparent elements from
Applications such as CS2, CS3, and Quark 7.
Therefore, Printing to PostScript, Saving as EPS, and Saving directly
as PDF 1.3 format all cause the Transparencies to Flatten and
knock-out the lower level elements. In addition, the region of a
dropped shadow that overlays a Pantone Vector Color will have two
colors. The rectangle around the dropped shadow is converted to image
data and processed by the Input Profile while the surrounding region
remains a Named (Pantone) Vector Spot which gets converted (if
properly done) from it's Looked-up Lab value to the Output Profile.
From the Applications of CS2 & CS3, you can Export to a 1st
generation PDF. By using the settings of "High Quality Print", "PDF
1.5 format", and "PDF/X = None" (very important), you will be
creating a PDF that has all of its internal color elements in their
native color space. Nothing is being pre-processed, converted, or
flattened. RGB, CMYK, Grayscale, Lab, Vector Spot, embedded ICC
Profiles, and the "Live Transparencies" are all saved as part of this PDF file.
As a test, we've saved to EPS or Print PostSript and then processed
through Distiller to a PDF. Unfortunately, it's too late. The
Transparencies were flattened in the first step. The 2nd generation
PDF can not resurrect the Transparencies.
Regards,
Larry Spevak
ColorBurst
At 02:54 PM 5/8/08, John W Lund wrote:
Hello,
First, I want to offer a big thank you, to both Tom Lianza and Larry Spevak,
for interesting, useful & timely contributions to this thread.
As someone having successfully used the ColorBurst RIP for years, for
proofing & for fine art printing as well, I wanted to offer a bit of a
contrary observation about the statement referenced below. It's been my
experience that some of Adobe's more ambitious product features (e.g.,
building files combining tints of spot colors with transparent elements) are
frequently unprintable, whether run through RGB printer drivers, various
RIPs - even "printing" to older versions of Adobe's own pdf format.
I assume this is related to the fact that Postscript just doesn't support
things like transparency, so the applications must be performing some sort
of coding contortions 'behind the scenes' to get these features to work.
Even with the ColorBurst RIP, I find it necessary to have the application
(say, Illustrator) handle flattening, and converting all spot colors to
process prior to sending the print job to the RIP. (CB tech support
recommends printing to pdf first) Whatever the issues, I wish that I could
get the RIP to handle this instead - to retain Xproof's better spot color
simulation, for example.
Thinking about this makes me wonder if Mr. Lianza's complaint about color
managed printing being broken is, if anything, optimistic. After all, even
the various Adobe apps - PS, AI, ID & Acrobat - don't seem to share a common
print architecture. They don't even share the same print UI (or color
management UI, for that matter!). Makes the prospect for OS's & printer
manufacturer's coming up with a coherent approach seem even less likely (I
hope I'm wrong)...
Regards,
John Lund
JWL Images
Emeryville, CA
ColorBurst Systems <email@hidden> wrote (in part):
...<big snip>...
> When Applications attempt to perform color management they can flatten
> elements (losing transparencies), convert Pantones to Process without the
> benefit of starting from a single Lab reference. Therefore, two Pantones of
> the same color - from different sources like an embedded EPS and a Document
> Spot Color will not print the same, and the list goes on, and on, and on.
>
_______________________________________________
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
_______________________________________________
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