Re: SNAP 2009 Profile and PDFs
Re: SNAP 2009 Profile and PDFs
- Subject: Re: SNAP 2009 Profile and PDFs
- From: Refik Telhan via colorsync-users <email@hidden>
- Date: Wed, 13 May 2020 04:06:14 +0300
- Thread-topic: SNAP 2009 Profile and PDFs
Hi Gary,
When you pull the image back to Photoshop for editing, the ICC profile is
displayed as “Modified SNAP 2009”. Even if you pick “SNAP 2009” as the
Simulation Profile for Output Preview, Acrobat treats them as different
profiles and does a conversion.
Interestingly, the CMYK values for these two patches are slightly different
when you embed SNAP 2009 in the “No Conversion” or the “Convert to Destination”
mode using SNAP 2009.
No Conversion:
Black: C44-M41-Y48-K69
Red: C2-M91-Y70-K0
Convert to Destination - SNAP 2009 set as destination:
Black: C45-M42-Y47-K66
Red: C3-M89-Y71-K0
While you are in Photoshop assign “SNAP 2009” to the image, convert it to Lab.
You will end up with:
Black: CIELAB (14, 7, 12)
Red: CIELAB (55, 70, 33)
Guess what happens when you convert the Lab image back CMYK with SNAP 2009
using relative colorimetric rendering intent + black point compensation:
Black: C44-M41-Y48-K69
Red: C2-M91-Y70-K0
The reason why Acrobat is changing the name of the profile from “SNAP 2009” to
“Modified SNAP 2009” is beyond my comprehension. I have not seen any thing like
this before.
“SNAP 2009” (SNAP_220_2009.icc) appears to have been created as an ICC profile
verison 4.1 in 2009 using ProfileMaker v5.0.8. Having this profile recalculated
with the latest known version of ProfileMaker, namely v5.0.10, as an ICC
profile version 2 may help.
Best regards,
Refik Telhan
--------------------------------------------------------
Refik Telhan, EE B.Sc.
Light and Color Management Consultancy
UNIQ B2 Blok,
Kat:5, Ic Kapi No: 605, Ofis No: TT02-AA23
Maslak Ayazaga Caddesi No:4, Huzur Mahallesi
Sariyer, Istanbul, Turkey
Mobile: + (90) (532) 426 21 87
--------------------------------------------------------
On 13.05.2020 02:25, "PPS Lists via colorsync-users"
<email@hidden> wrote:
I’ve got an odd thing happening with making PDFs with documents created
using the SNAP 2009 ICC profile.
For context, here’s what I can successfully do with other profiles, but
does not work with SNAP 2009.
1. Create a blank CMYK document in Photoshop and assign any CMYK profile
(set aside SNAP 2009 for now).
2. Create a black box – 100% K only.
3. Create a red box – 100% M and 70% Y.
4. Save as a Photoshop PDF using either Convert to Destination using the
same profile as the destination, or No Conversion.
5. Open the PDF in Acrobat and examine it with Output Preview in Print
Production. Every time the color numbers will not have changed from the values
above, as expected.
Day in and day out I can successfully do this except - when I use SNAP
2009. With SNAP 2009 the 100% K box gets converted to 4-color and the red
values change as well.
If I save the file as Photoshop EPS and run it through Distiller the
problem goes away and the color numbers do not change. I also don’t experience
this with Illustrator.
Has anyone else come across this? This is the only profile that I had this
happen with (so far).
---
Gary Smith
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