Patent ID: 7670667

Claim:
A biaxially oriented polyester film comprising at least one base layer (B), said base layer comprising from about 0.25 to less than 1.0% by weight of SiO 2 and from about 0.25 to less than 1.0% by weight of TiO 2 , wherein the size of the SiO 2 particles, d 50 , is from about 1.0 μm to 3.0 μm and the size, d 50 , of the TiO 2 particles is from about 0.02 to 0.5 μm and said films exhibit (i) a gloss, measured at 60°, ranging from 20 to 100, (ii) a highest elevation, R p , of less than 4.0 microns and (iii) a number of surface elevations higher than 0.1 microns of from 800 to 10 000 per mm 2 .