Process for producing magnetic recording medium

A method for making a magnetic coating composition, comprising the steps of:

• intimately admixing and kneading a mixture of a finely divided magnetic powder having a major axis length of 0.1 .mu.m or less as the sole powder component, a vinyl-chloride copolymer-based first binder resin having an average degree of polymerization of from about 100 to about 200 and containing from about 0.3 to about 3.0% by weight of quaternary ammonium salt groups, from about 0.1 to about 1.5% by weight hydroxyl groups and from about 1.0 to about 10% by weight of epoxy groups, based upon the weight of said copolymer, and a solvent, the weight ratio of said magnetic powder to said first binder resin being from about 6 to 15:1, said mixture having a solids content of from about 75 to about 95% by weight, until a substantially uniform first dispersion is obtained;
• admixing said first dispersion with a mixture of a non-magnetic hard inorganic powder, a second resin binder and a solvent until a second relatively dilute dispersion is obtained;
• and
• thereafter, admixing from about 0.05 to about 0.5 parts by weight, based on 100 parts by weight of said first binder resin, of a cross linking compound into said second dispersion to form said magnetic coating composition.