How to Disable Print Screen?

I know this thread is old but I was doing some thinking about the subject and I figure that if there truly was a way to disable the function of printing for copyright issues, it would have to be in the image file format itself, not the html or javascript code. What made me think of this is one day I tried to print a jpg or bmp, cannot remember exactly, but when I printed to screen, the image was diluted and pretty much unusable. I'm sure it was a fluke but with that in mind, creating a file format that contained security data inside that file would be the way to go. I have not even googled it to see if that is avaiable or not but it sounds like the only way to resolve this issue