| CLOCK | ELAPSED | EVENT | AIR | CHARCOAL | ORE | |||||
| UNIT | COUNT | TOTAL | UNIT | TOTAL | ||||||
| gage | LpM | P | bucket | kg | kg | kg | ||||
| 12:00 | start wood splints pre-heat | |||||||||
| 12:50 | very gentle air (maintain burning) | |||||||||
| 14:10 | gentle air | 26 | ||||||||
| 14:40 | adjust air | 70 | 2.5 | |||||||
| ash level about 5cm below tuyere | ||||||||||
| 14:52 | 2:52 | start main sequence | ||||||||
| 12:00 | fill with graded charcoal | 2 | 2 | |||||||
| 12:13 | :13 | charcoal | 1 | 3 | ||||||
| 12:30 | :17 | charcoal | 1 | 4 | ||||||
| 12:35 | air increase (by sound) | 80 | 650 | 3 | ||||||
| 12:46 | :16 | charcoal | 1 | 5 | ||||||
| 12:48 | temperatures: | |||||||||
| 1= 1170 2 = 1375 | ||||||||||
| 13:04 | :18 | charcoal | 1 | 6 | ||||||
| 13:11 | first ore - as slug | 1 | 1 | |||||||
| 13:21 | :17 | charcoal | 1 | 7 | ||||||
| 13:35 | 0:14 | ore added as 1/2 kg | 1 | 8 | 1 | 2 | ||||
| 13:47 | 0:12 | ore added as 1/3 kg | 1 | 9 | 1 | 3 | ||||
| 13:53 | temperatures: | |||||||||
| 1 = 620 2 = 985 4 = 1245 | ||||||||||
| 5 = 1250 6 = 1140 7 = 1105 | ||||||||||
| 8 = 1040 top = 625 | ||||||||||
| 14:05 | :18 | high slag level / ore as 1/2 kg | 1 | 10 | 1.5 | 4.5 | ||||
| 14:18 | :13 | 1 | 11 | 1.5 | 6 | |||||
| 14:35 | :17 | 1 | 12 | 2 | 8 | |||||
| 14:51 | 0:16 | 1 | 13 | 2 | 10 | |||||
| 15:07 | 0:16 | 1 | 14 | 2 | 12 | |||||
| 15:31 | temperatures: | 1 | 15 | 3 | 15 | |||||
| 1 = 720 2 = 960 4 = 1100 | ||||||||||
| 5 = 1100 6 = 1115 7 = 1000 | ||||||||||
| 8 = 870 top = 800 | ||||||||||
| 15:42 | :18 | 1 | 16 | 3 | 18 | |||||
| 15:54 | 0:12 | start burn down | 1 | 17 | ||||||
| 16:30 | 0:36 | extraction (approximate) | ||||||||
| TOTAL | charcoal | |||||||||
| ore | 18 kg | |||||||||
| time (main) | 4:30 | |||||||||
| bloom | 4.9 kg | |||||||||
| yield (corrected for water) | 33% |