You're right CIECAM. PhotoShop's default is indeed SWOP.
SOME PROBLEMS WITH SWOP IF USED ON C2S/SHEETFED.
For the uninitiated, US Web Coated (SWOP) v2 is intended for WEB OFFSET and not sheetfed printing condition. If my memory serves me right SWOP files should be separated using 133lpi. This is a bit low for sheetfed production where 150 or 175 lpi is common.
COLOR SHIFT:
If my job is NOT critical then US Web Coated (SWOP) v2 icc profile should be okay when printed on a sheetfed press on a normal C2S paper. Well, as long as the press uses inks based on ISO 2846 and prints on ISO 12647-2 norms (CMYK Delta E 1-5)....then I guess it's not going to give major problems.
But if my job IS CRITICAL then I'd have second thoughts using SWOP because chances are I'd experience some hue error.....especially on the blues. Better to use US Sheetfed Coated or ISO coated (eci) than SWOP.
COMPARATIVE COLOR ANALYSIS:
I compared the color gamut (*a*b) of 3 color profiles. You will see the smallest color gamut on white border is US Web Coated (SWOP) v2. This profile was created using LWC paper....I think.
Next is US Sheetfed Coated seen with a yellow border. It's bigger than US Web Coated but still a lot smaller than ISO 12647-2 shown on red border.
http://www.friendster.com/photos/36969309/1/887076342The next link compares further ISOcoated_V2_eci.icc (Red border) to a much bigger gamut of PSO_Coated_NPscreen_(ISO12647) eci. This is the icc profile from a stochastic process (gray border).
http://www.friendster.com/photos/36969309/1/524139959LOW TOTAL AREA COVERAGE:
Using US Web Coated (SWOP) v2 profile on Paper Type 1 (C2S).....shadows will be a bit lighter as SWOP's total area coverage (ink limit) is only 300% while ISO coated (eci) is between 330% - 340% TAC.
NEEDED CORRECTIVE ACTION IN PRESS:
So, if our shadows are not that deep.....the operators would naturally overink the black by increasing the ink density.
ADDED COST:
Just a thought. Not so long before I requested 3 printing consultants to do a calculation on ink film weight. After comparing their calculations, I learned that if we increase our ink density by a meager .25 (Example K 1.70 + .25 = 1.95) we don't realize that we are using 50% - 55% more ink!!!!!
Sanamagan!
PROOF MISMATCH:
We won't have a good match when proofs are compared with the press OK sheet. 'Tis why we need to change the numbers in the supplied file (via device link) for the proof and press to match.