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Always CONVERT your files to sRGB before saving for Web.
In CS3 you can set the Save for Web preferences so it always converts to sRGB on the fly.
If you use Save for Web, you have to manually convert to sRGB before using it indeed. The Save for Web in CS 2 also does not tag the image correctly with the icc profile. In CS 3, the Save for web can be set up to correctly tag the image. Even if you use save for web, you should tag the image except when it is a very small thumbnail. Some labs accept other color spaces than sRGB and in that case, you definitely want to tag the image if you use adobeRGB or so. Also, if you print at a lab, you might want to look into using their icc profiles to get more consistent color. Usually sRGB works OK though.
Ramón and Jao,
Thank you both for your suggestions. I will do it the way you suggested. It will be quite a relief to get this solved. Thank you again.
That was it! I never doubted your suggestion but it is so nice to see this problem solved. It is doubtful I would have figured that out in a million years. Thank you, again.
By the way, for others who might find this thread. The conversion is done from the menu bar. Choose Edit -> Convert to Profile and specify sRGB.
I do have a related question. Suppose I have completed edits and adjustments on my 16-bit, full-size master image and saved it. To get from this point to a JPG image for my lab I will now typically do the following steps.
1. Crop/resample to print size
2. Convert to profile
3. Convert 16-bit to 8-bit
5. Save as JPG
I would do steps 4 and 5 last. Does the order of steps 1 to 3 matter? Is there an optimum order here? Thank you.
I would do the sequence 2>3>1>4>5. You want to convert to the new profile at the biggest size as PS will use dithering in the widest profile to approximate certain details.
The best order in theory is: 1>4>2>3>5.
Jao, thank you. Your rationale makes sense. I have been using your suggested workflow.
You've probably seen that your suggestion differs from Jao's suggestion. Would you care to elaborate on your rationale for choosing this order? I've tried to figure it out but have no good ideas. Either way, thank you.
> rationale for choosing this order
Not to speak for Thomas, but I agreed with him for the following reasons:
1) Speeds up all subsequent operations
4 & 2) Best done with all information available (16bits)
3) Required for (5)
> 4 & 2) Best done with all information available (16bits)
I might have thought there'd be no difference in the order here, but since the Thomas and Jao disagreed, I might offer the following reasons for 4 before 2:
Larger gamuts might offer contrast in the otherwise out-of-gamut colors and thereby be informative for sharpening. Else, arguments can go either way depending on subject matter in the image, and I also imagine an argument can be made for the better gamut precision that sRGB offers (altho highbit data would offer all that is required for precision).