All window clings and view thru vinyl are printed on the "non-adhesive" side which means they adhere to the outside of the window. It's impossible to print on the adhesive side to have it adhere on the inside, because if we printed on that side, you would remove the printing when you remove the adhesive liner.
It's a common misconception that people think window clings and view thru vinyl are mounted on the inside of the glass, but they actually are not. If you go to virtually any storefront with clings or view thru vinyl, banks, stores in NYC, etc, you'll see that they are mounted on the outside, and people do not disturb them.
Images cannot be reversed to show through the back of them, as the media is opaque.
We print for many banks, jewelry stores, restaurants, etc, and everything is mounted on the outside of the window.
We have a great article about this topic on our blog, "Adhesive Window Graphics: Why are they installed on the outside?" Check it out for even more information..