Support for magnetic recording

A.SUPPORT FOR MAGNETIC RECORDING. B.CARACTERISE IN THAT CONTAINS THE BOND COMPONENT HAVING POWER OF ADSORPTION ON SURFACE THEREOF POWDER MAGNETIC THAN 1,5MILLIGRAMME PER SQUARE METRE OF SPECIFIC SURFACE OF POWDER, TEST SOLUTION TO 3 IN WEIGHT SOLVENT methyl-eTHYL-kETONE, AND LAYER MAGNETIC WITH VOLUME CONCENTRATION PIGMENT POWDER BETWEEN 60 AND 75. C. SUPPORT FOR USE AS TAPE RECORDING AND MAGNETIC COPYRIGHT INFORMATION.