Exposed rated 320, bathed 20 minutes in highly diluted Perceptol (1+3) at 20 ...
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Ilford HP5+ 400 at 3200 in Ilford Ilfotec DD-X 1:4
21 minutes at 24°C/75.2°F
Adox CMS 20 II in Agfa Rodinal 1+200
30 minutes at 20°C/68.0°F
Kodak Tri-X 400 at 3200 in Kodak HC-110 1:63
45 minutes (Stand developed) at 20°C/68.0°F
Ilford FP4+ 125 in Adox FX-39 1+9
9 minutes, 30 seconds at 19°C/66.2°F