I am merley using ProPhoto so that in the future if there are monitors that can display the full colour range, i would not have 'lost out' extra colors.
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I agree that it is wise to use ProPhotoRGB so as to preserve all the colors that you have captured with your digital camera. However, if you are making prints, the print is the format that has the most limited gamut. Examination of 3D gamut plots such as are available at the DryCreek web site is instructive. The best monitors such as the Eizo CG 220 can pretty much display the full aRGB gamut. Any monitor has a much higher dynamic range than a reflective print, which can have a 1:100 contrast ratio at best with a glossy surface.
If you look at the plot with aRGB, Eizo-CG220, and a Fuji Frontier with Crystal Archive Glossy paper, you will see that the gamut of the printer is considerably less than that of the monitor and aRGB space, except for a region of yellow with L of about 80. If you go to a LightJet 5000 with the same paper the gamut is slighter larger.
An Epson 4000 with glossy paper has a considerably larger gamut than the Crystal Archive Glossy paper. It can print greens and yellows well outside the aRGB gamut at L = 40-50 and 80 respectively.
[a href=\"http://drycreekphoto.com/tools/printer_gamuts/gamutmodel.html]http://drycreekphoto.com/tools/printer_gam...gamutmodel.html[/url]