It’s a common problem facing desktop publishers; a client walks in and hands them a CD full of low resolution graphic files, and asks that they be blown up and used in a printed piece. “They look great on our website,” they say enthusiastically, “so we’re sure they will look great in our printed catalog ... only we want them to be even bigger!”
As a graphics professional, you are faced with a dilemma. If you follow the maxim that the customer is always right, and blow the photos up and have them printed as is, that will only lead to the inevitable customer relations disaster that will follow. Alternatively, do you follow your professional instincts, and let your customer know that they have a problem from the beginning, and risk having them go to another desktop publisher who will mislead them into thinking that there is no problem? Or is there another solution?
Unfortunately, contrary to the misconception of many non-graphic designers, there is no easy way out of this situation if the client is hell bent on having the photos printed as is. but to learn more about image resolution refer to Basics of Image Resolution. A low resolution photo cannot be effectively blown up without creating quality problems in the printing process. There are ways around the problem, though, that involve a bit of cooperation between all parties involved.