Often, it is necessary to edit for the differences in how images transfer from screen to print since ink on paper does not have the same advantages as a high-res backlit computer screen. Also, since we use an uncoated matte paper, ink absorbs a bit more and thus images that are dark can look even darker in print.
One trick you can use to account for the transition from screen to print is to drop your screen brightness down slightly (to about 50%) and then make any adjustments to brightness or contrast from there to help ensure a bright and clear print.
Feel free to drop us a note if you have questions.