METHOD OF COATING A MAGNETIC RECORDING MEDIA COATING ONTO A SUBSTRATE, WHEREIN THE COATING IS SUBSTANTIALLY FREE OF BENARD CELLS

摘要

A method of depositing a magnetic recording media coating onto a substrate, wherein the coating is substantially free of Benard Cells, the method comprising the steps of: (a) providing a dispersion comprising a polymeric binder, a pigment, and a solvent; (b) coating the dispersion onto a surface of the substrate; (c) drying the dispersion; (d) calculating values comprising mu , beta , and d representing the viscosity, temperature gradient, and wet caliper of the dispersion, respectively; and (e) during the course of carrying out steps (a), (b) and (c), maintaining the ratio beta d<2>/ mu below a threshold value sufficient to substantially prevent the formation of Benard Cells in the magnetic recording media coating.