magnetic recording layer the magnetic recording layer is formed by dissolving or dispersing the above described composition in an organic solvent and then coating the resulting solution or dispersion onto a non magnetic support the non magnetic support can have a thickness of about 3 to 50 u03bcm preferably 10 to 40 u03bcm suitable materials which can be used for producing the support are polyesters such as polyethylene terephthalate polyethylene 2 6 naphthalate and the like polyolefins such as polypropylene and the like cellulose derivatives such as cellulose triacetate cellulose diacetate and the like polycarbonates etc the magnetic recording layer can be coated on a support using coating methods such as air doctor coating blade coating air knife coating squeeze coating dip coating reverse roll coating transfer roll coating gravure coating kiss coating cast coating spray coating and the like and other coating methods can be used these methods are described in coating kogaku coating engineering page 253 to 277 published by asakura shoten tokyo mar 20 1971 the coating thickness is ordinarily 0 5 to 10 microns preferably 0 8 to 6 microns on dry base typical organic solvents which can be used in the present invention include ketones such as acetone methyl ethyl ketone methyl isobutyl ketone cyclohexanone and the like alcohols such as methanol ethanol propanol butanol and the like esters such as methyl acetate.