invert the first minute and the first 10 seconds of every minute.
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Freestyle/Arista EDU Ultra 100 in Adox Adonal 1+50
7 minutes at 20°C/68.0°F
Foma Fomapan 400 at 1600 in Kodak HC-110 1+31
13 minutes at 20°C/68.0°F
Ilford Delta 400 in Kodak D-76 1+1
14 minutes at 20°C/68.0°F
Ilford HP5+ 400 in Kodak D-76 1+1
13 minutes, 30 seconds at 20°C/68.0°F