Photo Shop Prints is an article about one of the more challenging areas of computer graphics, largely due to the difference between what you see on the screen (RGB) and what appears on paper when RGB (red-green-blue) is converted to CMYK (cyan-magenta-yellow-black). Here are a variety of tips to help you get quality results with your home or office printer, or if you choose to use a professional printer.

As noted in the Slides Scanning article, colors that work in the RGB color space are often out of gamut in the CMYK color space; meaning that what you see on the screen cannot be printed using color inks. Other Photo shop print issues are different RGB spaces among scanners or monitors, a different CMYK space among printers and printing presses and your monitor going through color shifts as it ages.

If you choose to use a commercial printer, I recommend that you do all of your work in RGB. DO NOT convert your Photo shop print files to CMYK. Instead, collect all your edited and original files (don't edit your originals in case there's a problem), then bring them to the printer and make them responsible. (If you do convert to CMYK be aware that you lose a great deal of color data. And if you do too many manipulations past this point, the loss of color data could posterize your image.)

This is probably the most comprehensive and authoritative directory of commercial printers on the net.

You can search for commercial printers via state, city or specific keywords. If it isn't listed here, it probably isn't worth knowing about.