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Old 12th March 2014, 03:02 PM
Alan Clark Alan Clark is offline
Join Date: Aug 2009
Location: North Yorkshire
Posts: 1,336

Originally Posted by richardw View Post
Here is how to make the Paterson Orbital bombproof!

I think his method of lifting the edges an inch is asking for trouble and can lead to uneven development round the edges caused by developer bouncing off the sides of the tray.
This is something I should have emphasised more in my original article, though I did say the agitation should be gentle.
To be clear about this, when I use a tray as described in the article, and when I use a Paterson Orbital, I lift the corners by the absolute minimum amount I can manage, i.e. no more than a few millimetres. After gently lifting one corner like this I move straight to another corner, lifting sucessive corners in a random fashion. The objective is to get the developer to move very gently. That way you get even development.

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