Recipes & dev times using Film Ilford HP5+ 400

Ilford HP5 Plus shot at 400ASA, developed in Rodinal 1+50 for 11 minutes @ 20...

Agitation first 30sec continuous, then first ten seconds of every minute

First agitation for 30", than 4times for every minutes

Agitate once every minute for 10 saeconds (which for me is six inversions)

The first 30 seconds moderate inversion agitation (20x), then every minute 4x...