Rol-Vac-BL Film is Metallized Polyester Film with high transparency.  Used mostly in the lamination and board lamination, it is available with several different surface treatments including but not limited to Chemical, & No Treatment.  Rol-Vac, LP will customize your metallization needs from 0.18 Optical Density (Microwavable) on up to 4.50OD and greater.  This film more commonly is metallized to a standard metal layer of 2.2 optical density.  It traditionally provides gloss readings in the 750-800 range and the base film has a haze level of 2.4 or less.