There are so many material options to choose from, and each has its own unique effect on the final print that proofs are the only way to be absolutely certain how your finished print with look.
We strongly encourage proofs when your job has to be as expected. We offer proofs off our calibrated and profiled dedicated proofing system. These are an inexpensive option that allow you to see that your file is as expected in terms of layout and to a large degree – color. When the proof has to be 100% precise, request a proof on the actual material that will be used for your job. This will give the full effect the material has on the final print. Surface texture, gloss vs. matte, and the material’s unique color of white, all effect the results.
For most jobs, you can rely on our day to day high quality and completely color managed large format print systems to give you the best prints you can get. But to be sure your expectations match what is going to happen on a particular material, proofs are a necessity.
Thanks for the information.