The window graphic material being used is what we call Window Perf. It’s a regular adhesive vinyl with 1mm holes in it. The material we stock is 60% vinyl and 40% holes, black on the back and white on the side to be printed. The adhesive is on the black side, of course, since we can’t print on the adhesive side without things getting gummed up!
What this material allows the customer to do is to create a window graphic that allows people on the inside of a store to see out, but people on the outside see the graphic and not the interior of the store. Sometimes that’s for privacy, as here, and sometimes for security.