Photoshop is IMHO the greatest app ever invented. I think the Knoll brothers are deserving of a Nobel prize for app creation. Photoshop is the best thing to happen to comics since Jack Kirby. I even once wrote an article published in a major comics magazine that lovingly detailed the history of Photoshop in comics. So please do not think this post is a knock on Photoshop. It isn’t. I’m simply pointing out a known deficiency in the program.
Large Gradients. Photoshop still does not handle large color gradients without producing at least some banding.
This is the one nut that Photoshop engineers have never been able to crack. It’s improved a bit. But even in CS4 you will still see some banding in areas with large gradients. Zoom in. You’ll see it on the screen. It’s unmistakably there.
So if you have submitted a job to us that has large color gradients created in photoshop that inherent banding will find its way into our print. If colors at the extreme ends are close then the banding may be very subtle … maybe even hard to detect at print resolution. But if you have a lot of variance from one end of your gradient to the other, then you will see some banding. It’s unavoidable, I’m afraid.