Patent ID: 8541107

Claim:
A base film comprising: A. a chemically converted polyimide in an amount from 63 to 96 weight percent of the base film, the chemically converted polyimide being derived from: a. at least 50 mole percent of an aromatic dianhydride, based upon a total dianhydride content of the polyimide, and b. at least 50 mole percent of an aromatic diamine based upon a total diamine content of the polyimide; B. a pigment, other than carbon black, present in an amount from 2 to 35 weight percent of the base film; and C. a particulate matting agent that: a. is silica and is present in an amount from 1.6 to 10 weight percent of the base film, b. has a median particle size from 1.3 to 10 microns, c. has a density from 2 to 4.5 g/cc, and the base film has a 60 degree gloss from 2 to 35.