Slightly underdeveloped - I think requires at least one minute more!
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Ilford HP5+ 400 at 6400 in Kodak HC-110 1:31
40 minutes at 20°C/68.0°F
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16 minutes, 30 seconds at 20°C/68.0°F
Kentmere Photographic Kentmere 400 at 800 in Ilford Ilfotec DD-X 1+4
13 minutes at 20°C/68.0°F
Kentmere Photographic Kentmere 400 at 800 in Ilford Ilfotec DD-X 1+4
13 minutes (Stand developed) at 20°C/68.0°F