Agitate the first minute and then 5s every minute.
Recipes & dev times using Developer Tetenal Ultrafin Plus
Kodak Tri-X 400 at 3200 in Tetenal Ultrafin Plus 1+6
30 minutes (Stand developed) at 20°C/68.0°F
Fuji Neopan Acros 100 in Tetenal Ultrafin Plus 1:4
6 minutes, 30 seconds at 20°C/68.0°F
Fuji Neopan Acros 100 in Tetenal Ultrafin Plus 1+6
12 minutes at 20°C/68.0°F
Ilford Delta 100 in Tetenal Ultrafin Plus 1:6
9 minutes at 20°C/68.0°F
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