A magnetic layer is overlaid on the front surface of a substrate, and a backing layer is overlaid on the back surface of the substrate. The backing layer is formed by the application of a coating composition, which contains inorganic grains and a binder, to the back surface of the substrate. The coating...http://www.google.es/patents/US5236738?utm_source=gb-gplus-sharePatente US5236738 - Method for making magnetic recording media by kneading, dilution kneading, and dispersing a mixture of inorganic grains, binders, and solvents
Method for making magnetic recording media by kneading, dilution kneading ...
