Nitrate

Cellulose nitrate, the film stock that everything was shot on before safety stock replaced it in the early 1950s. It is chemically unstable, it decomposes on its own schedule, and it is flammable enough that storing it requires purpose-built cold vaults that most countries built decades ago.

It matters here because nitrate is not a copy of the early films. It is the early films. A later duplicate carries the images; the nitrate carries the actual object that ran through the camera, which is what an archivist means by “original format.”

The single bleakest sentence in the literature on Philippine cinema is about this stock: no nitrate elements of a domestically produced Filipino film are known to exist. The last one, the dupe negative of Ibong Adarna, was destroyed roughly two years after its 2005 restoration, because no facility in the country would store it.

Source: Bliss Cua Lim, The Archival Afterlives of Philippine Cinema, Duke University Press, 2024, p. 2 for the zero and pp. 1 to 2 for the Ibong Adarna negative. The book is paid; Duke publishes the full introduction free, and it contains both facts. Lim argues that Philippine film preservation fails for institutional and political reasons rather than technical ones.

First used in: 3.2 · A cinema that lost its own childhood