DERFLEX has been in digital printing media industry for more than 20 years. And have been producing one-way vision film products since 2005. 
The PVC perforated vinyl film is a common product for windows and doors advertising. The Optical effects is that you can see the printed pictures from one side, and see through the holes from the opposite side of the one way vinyl.
If you have more interest in our windows stickers, please contact us freely.