Ah.... So what they appear to have done. Is because they are no doubt digital printed. They have used a thick vinyl. (printed onto white because the digital inks really need to be) The thick vinyl is needed as they can not be printed onto clear and have thicker clear boarders. A bit of a shame you can see the white.... But I guess that's the world we live in. Cheap made throw away society.
Hanging to check them up close. Would be great to make them in some other colours!!!! ;)