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" <colorsync-users@lists.apple.com> 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 _______________________________________________ Do not post admin requests to the list. They will be ignored. colorsync-users mailing list (colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/rtelhan%40icloud.com This email sent to rtelhan@icloud.com