Expired black & white film
Black and white film keeps better than any other type. With no dye layers to fade out of balance, an expired roll loses speed and gains fog but holds its character, which is why decades-old black and white stock is often still perfectly usable while colour of the same age has shifted badly. Compare expired black & white film prices from UK retailers on Filmproof.
About Expired black & white film
Why black and white ages well
A monochrome emulsion is a single silver halide layer, so there is no colour balance to drift. What ageing does instead is raise base fog, which lifts the shadows and lowers contrast, and slowly reduce effective speed. Both are straightforward to work around, and neither changes the look of the film in the way a colour shift does.
Slow film keeps best. An ISO 100 stock is far less sensitive to the background radiation that fogs film over time than an ISO 400 or 3200 one, so expired Pan F or FP4 will often shoot close to box speed decades on, while expired Delta 3200 can be badly fogged within a few years of its date.
Shooting and developing expired black and white
Start with the usual stop of extra exposure per decade, but black and white gives you a second lever colour does not: development. Pulling development slightly, or using a compensating developer, holds back the fog that extra exposure would otherwise amplify. If you develop your own film, a clip test from the first roll of a batch tells you exactly what the rest needs.
Because black and white ages so gracefully, expired stock is often the cheapest way to shoot a lot of film. Filmproof lists expired black & white separately from fresh across UK retailers, with live prices per roll updated daily.