Metallized BOPP film is very widely used in printing industry since it has different performances.
Types of BOPP film 
Single-side corona treatment BOPP film
Double-side corona treatment BOPP film

Heat-seal BOPP film
(1) Single-side corona treatment BOPP film can only be used as the surface material of decorative film, holographic printing anti-counterfeiting film, and lamination film.
(2)  Double-side corona treatment BOPP film can be printed on the surface layer and can also be used as the mid layer film material of the lamination films.
(3) Heat-seal metallized BOPP film can only be used as the inner layer material of the lamination film.
Metallized BOPP film should be used in time, and should not be stored in large quantities. Generally, the shelf life should not exceed six months. Otherwise, the adhesion of the aluminized layer will reduce.