Color slide film · Discontinued

Ilford Ilfochrome

Ilford Ilfochrome is a color slide film rated at ISO 32, developed in Ilford. Below: specs, an exposure guide and similar stocks.

ISO 32IlfordDiscontinued135
ISO 32
Box speed
Color slide
Type
Ilford
Process
Discontinued
Status
1960–1965
Years made

Film specifications#

Manufacturer
Ilford
Film
Ilfochrome
Speed
32
Process
Ilford
Formats
135
Base
Triacetate
Made in
UK
Status
Discontinued — replaced by Ilford Colour Slide

Character & history#

General purpose slide film for daylight. Originally sold as "Ilfachrome".

Description adapted from Wikipedia’s “List of discontinued photographic films” (CC BY-SA 4.0).

Exposure guide at ISO 32#

Sunny 16 for this film: f/16 at 1/30 s in bright sun. Negative film tolerates 2–3 stops of overexposure; slide film needs accuracy within about ⅓–½ stop.

Lightf/2f/4f/8f/16
EV 16 · Snow / beach, bright sun—1/1250 s1/320 s1/80 s
EV 15 · Bright sun1/2500 s1/640 s1/160 s1/40 s
EV 14 · Hazy sun1/1250 s1/320 s1/80 s1/20 s
EV 13 · Cloudy-bright1/640 s1/160 s1/40 s1/10 s
EV 12 · Overcast / open shade1/320 s1/80 s1/20 s1/5 s
EV 10 · Sunset1/80 s1/20 s1/5 s0.8 s
EV 8 · Bright interior1/20 s1/5 s0.8 s3.2 s
EV 5 · Home interior at night0.4 s1.6 s6 s25 s
EV 3 · City street at night1.6 s6 s25 s> 1 min

Long exposures#

Most films suffer reciprocity failure beyond about 1 second: they need more exposure than the meter says. As a rule of thumb add ⅓–1 stop for 1–10 s and 1–2 stops beyond 10 s for older emulsions; modern T-grain films (and Fuji Acros) need much less. Check the manufacturer's datasheet.

More Ilford films#

Frequently asked questions#

What ISO is Ilford Ilfochrome?

32 — set your meter to ISO 32 for box speed.

Is Ilford Ilfochrome still made?

No, it has been discontinued (1960–1965).

How do I develop Ilford Ilfochrome?

Ilford process.

Is Ilford Ilfochrome available in 35mm?

Yes — formats: 135.

Sources & licences#

Last updated October 03, 2026 · How we calculate · Sources

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