When a film on nitrate base is said to have been "preserved", this almost always means simply that it has been copied onto safety film or, more recently, digitized; both methods result in some loss of quality.
Ketika sebuah film berbasis film nitrat dikatakan telah diawetkan, ini hampir berarti bahwa telah disalin ke dalam film yang aman, atau baru-baru ini, didigitalisasi, kedua metode menurunkan kualitas film.