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Development time

CineStill CineStill 50Daylight in Bellini C-41 Monopart Kit

3:15 at 38°C (100°F), stock dilution, box speed.

Start timer · 3:15
Time
3:15
Continuous 15s, then every 30s
Dilution
Stock
Temperature
38°C
100°F
Box speed
ISO 50
C-41

Development time

DilutionEITimeTempAgitationEvidenceTimer
Stock503:1538°C / 100°FContinuous 15s, then every 30sManufacturerChecked 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 38°C (100°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 50Daylight
Daylight-balanced (5500K) cinema stock with remjet removed. Can be rated EI 12-100. Cinematic color palette with characteristic halation.
Notes on this pairing
  • Kit time; applies to any C-41 film. Developer at 38.0 ±0.2 °C for films 1 to 4; 3:30 for 5 to 8, 3:45 for 9 to 12, 4:00 for 13 to 16.

CineStill 50Daylight in other developers

Other films in Bellini C-41 Monopart Kit