These photos were shot on FPP InfraChrome Color Infrared 400. I bought this roll back in 2016 and kept it in my freezer for a few years before I finally shot it around Calgary. I used a Tiffen #12 yellow filter to achieve the infrared color effect.^[1]Rob Walwyn states that a yellow filter is often used with Aerochrome III to “limit the exposure of each layer of the film to its intended spectral region” by removing “the blue sensitivity of each of the layers”. Most of these photos were shot at ISO 320, but a few were shot at ISO 250. In retrospect, I wish I had rated the roll at ISO 200, but that is always the risk you take when shooting expired film.

FPP InfraChrome is actually re-spooled Kodak Aerochrome III Infrared Film 1443. Discontinued in 2009, Kodak Aerochrome III was an infrared-sensitive, false-colour aerial photography film originally designed for reconnaissance and camouflage detection, but also used in agriculture and forestry.^[2]See Kodak’s data sheet for more details. To learn more about this film, I recommend Rob Walwyn’s excellent Guide for Shooting Kodak Aerochrome Colour Infrared Film.

Since its discontinuation, prices for a roll of Kodak Aerochrome III have soared to the point of being prohibitively expensive and not worth the risk of purchasing a fogged roll. That being said, for a limited time you can buy some Aerochrome III on Dean Bennici’s website. While still espensive, Dean’s prices are a little more reasonable and he has thoroughly tested the film he sells.