9 minutes at 20°C/68.0°F
Came out overdeveloped. Time should've been around 6.5 - 7.5 minutes.
Developed in Caffenol-C-M fortified with D-76 stock 20:1 9min@20degC, agitation first 30 sec, then for 5 sec every minute.
I.e., the final soup formula was:
Water: balance to 525ml
Washing Soda: 27g
Ascorbic Acid: 8g
Instant Coffee: 20g
D-76 stock: 25ml