Soft-Proofing and Printing with Profiles
http://www.naturephotographers.net/mh0402-1.html

Hagadorn, Matt
Nature Photography
2004

Abstract:

Many photographers today print directly from Photoshop to photo-quality inkjet printers or send images to a lab to have enlargements made on LightJets, Lambdas, or the Fuji Pictography and Frontier systems. All of these devices are capable of stunning, photo-realistic output. However, if you do not employ color management effectively the output from these devices will not match the image you saw on your monitor. At best, you will waste some time, ink and paper making reprints. At worst, if you are sending images to a lab, proofs and reprints to get the image correct can become costly.