I really don't see the point with agitation when using thornton. To maximise edge effects, less is more. It is like the perfect stand developer; the stuff is not in the soup long enough to get the normal bad effects from stand. Yes, I do give a 30 second fierce shake ending with a firm tap to lodge the air bubbles. But that is it.

Here is an example of Orwo UN54

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I also realize there will be many that can't let go of the agitation, but the results are fantastic.

A nice side effect of this is the dev times get closer together, thus harder to screw up.