Лако-красочные материалы — производство

Barium ferrite pigments have been considered for several years for high-density dig­ital storage media [5.23, 5.24]. They are very suitable for preparing unoriented (e. g., floppy disks), longitudinally oriented (conventional tapes), and perpendicularly ori­ented media. In the latter the magnetization is oriented perpendicular to the coating surface. They are required for perpendicular recording systems, which promise ex­tremely high data densities especially on floppy disks. Barium and strontium ferrites are also used to prevent forgery of magnetic stripes, e. g., in cheque and identity cards.

5.1.5.1