Dye containing polarizing film

A dye-containing polarizing film which comprises, in a film substrate, at least one dye selected from,

• 1) a dye represented by the following formula (1):
• Q1--N.dbd.N--Q2--X--Q3--N.dbd.N--Q4 (I)
• wherein:
• Q1 and Q4, which are the same or different, are each indepedently naphthyl group which is substituted by at least one group selected from hydroxy or amino, and may be further substituted by sulfo, carboxy, C1-C4 alkylamino, C1-C4 alkylcarbonylamino, phenylamino or benzoyl amino;
• Q2 and Q3, which are the same or different, are each unsubstituted phenylene or phenylene group substituted by one or two substituents from hydroxy, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy and sulfo;
• and
• X is --N.dbd.N-- or ##STR45## and 2) a dye represented by the following formula (2):
• ##STR46## wherein:
• each Me is a transition metal selected from copper, nickel, zinc and iron;
• Q.sup.5 and Q.sup.6, which are the same or different, are each 1,2-naphthylene group unsubstituted or substituted by substituent selected from amino, sulfo, hydroxy, carboxy, C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy;
• Y is --N.dbd.N-- or ##STR47## and R.sup.1 and R.sup.2, which are the same or different, are each hydrogen atom, lower alkyl, lower alkoxy or sulfo group.