È costruita a strati, il supporto di base è un sottile nastro di materiale plastico (solitamente poliestere o triacetato di celluloide)
[...]The first photographic film was made from highly flammable nitrocellulose with camphor as a plasticizer (celluloid). Beginning in the 1920s, nitrate film was replaced with cellulose acetate or "safety film". This changeover was not completed until 1933 for X-ray films (where its flammability hazard was most acute) and for motion picture film until 1951.
Oggi è una pellicola "normale" , sei un pò arretrato....
Messaggio orinale: https://old.luogocomune.net/site/newbb/viewtopic.php?forum=13&topic_id=970&post_id=134314