The Safeguard of Audio Collections: A Computer Science Based Approach to Quality Control—The Case of the Sound Archive of the Arena di Verona

Table 1

The Table summarizes the results of the FTIR spectroscopic analysis in ATR. In the first column there are the tape samples. For each of them, the material composing the base (column titled Back) and the side with the magnetic particles (column titled Front) is indicated. Tapes are identified only by the brand, because the model was unknown for all but one (Tape E: BASF SPR 50 LHL).

Sample	Brand	Front	Back
Tape A	TEAC	PVC/vinyl-acetate copolymer	Cellulose acetate
Tape B	AGFA	Polyester	Cellulose acetate
Tape C	MAXELL	Polyester	Polyurethane
Tape D	TDK	Pet	Pet
Tape E	BASF	Polyurethane	Not identified^a
Tape F	Unknown	Polyurethane	Polyurethane
Tape G	3M	Polyimide	Pet
Tape H	BASF	Polyurethane	Not identified^a
Tape I	Unknown	Polyurethane	Not identified^a
Tape L	Unknown	Polyurethane	Not identified^a

aThe presence of degradation products or of a mixture of materials does not allow the identification only on the basis of FTIR.