I'm working with colour images that I have changed to black and white, and have altered the contrast of by playing with the different colour channels. My aim is to achieve the same tonal difference and brightness etc. that I am seeing on the screen when I print the images.
Which aspects of the image tend to be affected when printing? (I will be printing in full CMYK colour). I assume the brightness is one of them as my images always come out considerably darker than they appear on screen.