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Development time

CineStill CineStill 400Dynamic in Flic Film C-41 Eco Kit

3:30 at 39°C (102°F), stock dilution, box speed.

Start timer · 3:30
Time
3:30
Standard
Dilution
Stock
Temperature
39°C
102°F
Box speed
ISO 400
C-41

Development time

DilutionEITimeTempAgitationEvidenceTimer
Stock4003:3039°C / 102°FStandardManufacturerChecked Oct 2026Start timer

EI is the speed the film was rated at when shooting. Evidence says where each time comes from: the manufacturer’s own data, a named test, a compilation or several agreeing reports (community consensus), or one person’s report. Times marked “not yet verified” come from secondary sources and haven’t been checked against a manufacturer datasheet. Where sources give different times, every one is listed and marked “sources differ”.

Other temperatures

Colour developers run at 39°C (102°F) with a tight tolerance of around ±0.3°C, so there’s no reliable temperature chart. If you can’t hold the temperature, follow your kit’s instructions for its lower-temperature times.

Mixing

Dilution300 ml (10.1 fl oz) (one 35mm roll)500 ml (16.9 fl oz) (one 120 roll)
StockUse as mixed, undilutedUse as mixed, undiluted

How they work together

CineStill CineStill 400Dynamic
Daylight-balanced 400-speed with soft color palette and rich warm skin tones. Wide dynamic range and versatile exposure latitude.
Notes on this pairing
  • Kit time; applies to any C-41 film. Inversion tank at 39 °C: continuous for 10 s, then four inversions every 30 s. Jobo or machine at 38 °C: 3:00.

CineStill 400Dynamic in other developers

Other films in Flic Film C-41 Eco Kit