Research Article

A Systemic Approach to the Preservation of Audio Documents: Methodology and Software Tools

Table 6

Types of MiniDiscs [35].

Carrier Period Type of recording Composition

MD replicated 1992–2013    Digital Base: polycarbonate
Reflective layer: aluminium, varnish

MD recordable 1992–2013    Digital Base: polycarbonate
Magneto-optical layer: ferromagnetic material
Reflective layer: aluminum