Oui c est sur ce n est pas nouveau et pour dire les Type 2 Chrome sont en fait des ferricobalt les Japonais ayant trouve cette solution pour éviter le brevet Chrome de Dupont
IEC Type II tapes are intended for recording using high (150% of normal) bias and replay with the 70 μs time constant. All generations of Type II reference tapes, including the 1971 DIN reference that pre-dated the IEC standard, were manufactured by BASF. Type II has been historically known as 'chromium dioxide tape' or simply 'chrome tape', but in reality most Type II cassette tapes do not contain chromium.[50] The "pseudochromes" (including almost all Type IIs made by the Big Three Japanese makers — Maxell, Sony and TDK) are actually ferricobalt formulations optimized for Type II recording and playback settings.
Tous ce que vous voulez savoir sur les formulation est ici , désolé en anglais
https://en.wikipedia.org/wiki/Compact_Ca...rmulations
Pour ceux qui sont intéressé par les fondamentaux de la lecture de bande magnétique
https://restauration-sonore.over-blog.co...-2017.html
IEC Type II tapes are intended for recording using high (150% of normal) bias and replay with the 70 μs time constant. All generations of Type II reference tapes, including the 1971 DIN reference that pre-dated the IEC standard, were manufactured by BASF. Type II has been historically known as 'chromium dioxide tape' or simply 'chrome tape', but in reality most Type II cassette tapes do not contain chromium.[50] The "pseudochromes" (including almost all Type IIs made by the Big Three Japanese makers — Maxell, Sony and TDK) are actually ferricobalt formulations optimized for Type II recording and playback settings.
Tous ce que vous voulez savoir sur les formulation est ici , désolé en anglais
https://en.wikipedia.org/wiki/Compact_Ca...rmulations
Pour ceux qui sont intéressé par les fondamentaux de la lecture de bande magnétique
https://restauration-sonore.over-blog.co...-2017.html
"Il faut avoir une grande musique en soi si l'on veut faire danser la vie." Friedrich Nietzsche “