Process timer
Every bath in order, with agitation cues and a beep between steps. Choose a kit, or build your own sequence.
Times from Tetenal Colortec C-41 Instruction for use (Art. 102221/102230, leaflet code 391057/02) (2016). Check your kit’s own instructions, especially for reused chemistry.
Step 1 of 5
Pre-heat developer drum
5:00
Total left 16:15
Steps
38°C · 38 ± 0.5 °C
Maker’s agitation: Rotary (kit designed for rotary processors) · 38°C · 38 ± 0.3 °C. 3:15 for films 1-4 per litre (1-2 per 500 ml); see time_increments
Maker’s agitation: Rotary · 38°C · 38 ± 1.0 °C. 4:00 for films 1-4/L, rising to 15:00 for films 13-16/L. Minimum time; may be exceeded by up to 50%
Maker’s agitation: Flowing water, change water every 30 s · 30–40°C · Minimum time; may be exceeded by up to 50%
20–40°C
Your chemistry
Track each batch you mix against the maker’s capacity and shelf life. Saved on this device only.
Per litre of working solution. Max. 16 x 135-36 or 16 x 120 per 1 L kit; 40 per 2.5 L kit. Working solution: Not separately stated (see partly_used). Time increases: Per 1 L working solution, CD 3:15 (films 1-4), 3:30 (5-8), 3:45 (9-12), 4:00 (13-16); BX 4:00/6:00/10:00/15:00. For 500 ml: same steps per 2 films. Times include ~10 s drain. Push: +30 s CD per stop at 38 °C. With mainly ISO 400+ films, only three development runs per litre CD recommended.