Agitate continuously for the first 30 seconds. Then each minute for 10 seconds.
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Kentmere Photographic Kentmere 400 in Kodak HC-110 1:79
5 minutes, 30 seconds at 20°C/68.0°F
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10 minutes, 15 seconds at 20°C/68.0°F
Freestyle/Arista Premium 400 in Kodak HC-110 1+31
6 minutes at 20°C/68.0°F