1 minute of inversions, then 4 inversions every minute. Time from back of SPD...
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Foma Fomapan 400 in Ilford ID11 Stock
8 minutes at 20°C/68.0°F
Polystar Polypan F 50 at 100 in Ilford Ilfosol 3 1+9
8 minutes at 20°C/68.0°F
Rollei Rpx 100 at 80 in Tetenal Ultrafin Plus 1:4
13 minutes, 30 seconds at 20°C/68.0°F