Invert for first 30 seconds and then twice every 30 seconds
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Kodak T-Max 400 at 1600 in Kodak D-76 1+1
18 minutes, 30 seconds at 20°C/68.0°F
Fuji Neopan Acros 100 at 400 in Tetenal Ultrafin T-Plus 1+4
13 minutes, 30 seconds at 20°C/68.0°F
Kodak Tri-X 400 in Rodinal 1:50
7 minutes, 30 seconds at 20°C/68.0°F
Agfa Agfapan APX 400 (New) in Adox Adonal 1:50
21 minutes at 20°C/68.0°F