10 inversions for the first 30 seconds, then 4x each minute after.

Desert Sun Images's profile
Recipes by Desert Sun Images
Ilford HP5+ 400 at 640 in Kodak D-76 1:1
15 minutes at 20°C/68.0°F
Ilford SFX 200 in Ilford Ilfotec DD-X 1:4
10 minutes at 20°C/68.0°F
Ilford HP5+ 400 at 200 in Ilford Ilfotec DD-X 1:4
7 minutes at 20°C/68.0°F
Kodak Tri-X 400 in Kodak D-76 1:2
14 minutes at 20°C/68.0°F
Ilford FP4+ 125 in Ilford Ilfotec DD-X 1+4
10 minutes at 20°C/68.0°F
Ilford Pan F+ 50 at 40 in Rodinal 1+24
5 minutes at 20°C/68.0°F
Ilford HP5+ 400 at 1600 in Ilford Ilfotec DD-X 1+4
13 minutes at 20°C/68.0°F
Ilford HP5+ 400 at 1600 in Ilford Microphen Stock
11 minutes, 30 seconds at 20°C/68.0°F
Ilford HP5+ 400 in Kodak D-76 1:1
13 minutes at 20°C/68.0°F
Fuji Neopan Acros 100 in Agfa Rodinal 1:100
1 hour (Stand developed) at 20°C/68.0°F