Do they want to be able to see through this?
If not why perforated film?
+1
sounds like a failure waiting to happen
like others said... what does 'will it work" mean?
unless it's pure black, your eyes focus on the print inside, instead of the view outside the window... and if your client would rather people see the print then the view, what's the point of the perf? When there is light coming through, it will mess up the printed image, but the image will still mess up the view..
and the edge with signlabs printable perf concept is cool... but most
windows are larger then 11.8, and if there is one thing that looks horrendus with overlaps, it's perf patterns