Digital Light & Color

Since I do most of my printing at a place similar to Costco, I do all the PWP work in srgb to begin with. My monitor is loosely calibrated by a Huey and the resulting prints I get back from the store are very close to the monitor. To simplify things you could just use srgb as your color space.

But when I need a canvas print, I go to a local print shop. They use PhotoShop for everything. So I need to change that color profile to Adobe-rgb for them to get the colors close. I also noticed a big color jump when I converted between the two color spaces. So I asked for some help here and Jonathan told me about the little tab in the Change Color Profile box. So try this out. Go to Transformation/Color/Change Color Profile. Select srgb in the New Color Profile box and then select Profile Setting Only under Change. You'll see that as the very last setting in the Change Color Profile box. You'll notice that the new photo is exactly the same as the original with no color shift, only a different profile. This works for me.

A bit off topic, but maybe interesting nevertheless for those who print:
When you know the profile of your inkjet printer or (chemical) photographic process, you can compare the color space of your print with the various color spaces availbable in PWP.
The first figure is the sRGB space (wireframe) compared to the Fuji Crystal Archive paper(solid) that my print provider uses. As you can see, even sRGB is huge compared to traditional photographic paper, but sRGB misses a not unimportant part of green colors that the paper can reproduce. On the other side of the spectrum, not visible in the graphic, there are some magenta hues that can be printed, but are outside sRGB. The second graphic is similar, but shows AdobeRGB (wireframe) compared to the Fuji paper (solid). All the greens that the paper can reproduce are now within the AdobeRGB space, but there is still some magenta peeping out. The third one is the paper compared to Chrome2000. All colors that the paper can reproduce are within Chrome2000, but a lot of space is wasted.