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-   -   An easy way to develop sheet film (http://www.film-and-darkroom-user.org.uk/forum/showthread.php?t=1883)

richardw 12th March 2014 02:32 PM

Here is how to make the Paterson Orbital bombproof!

http://freepdfhosting.com/f640343f29.pdf

richard

Alan Clark 12th March 2014 03:02 PM

Quote:

Originally Posted by richardw (Post 91485)
Here is how to make the Paterson Orbital bombproof!

http://freepdfhosting.com/f640343f29.pdf

richard

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.

Alan

richardw 13th March 2014 12:24 PM

Quote:

Originally Posted by Alan Clark (Post 91487)
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.

Alan

Hmmm... It hasn't happened to me yet Alan, but I do use 1:100 and 1:500 working solutions of my favourite developers. I also pre-soak for 5 minutes in water before going on to developing. The lift and put down isn't violent or quick, so maybe that is why I get no uneven development?

richard

Alan Clark 13th March 2014 05:35 PM

Richard,as you are getting even development you will no doubt stick to what you are doing as it is obviously working for you. But if anyone is getting uneven development along an edge of the sheet of film adjacent to the outside of the container, then very gentle agitation is worth a try.

Alan

richardw 13th March 2014 06:05 PM

Quote:

Originally Posted by Alan Clark (Post 91520)
Richard,as you are getting even development you will no doubt stick to what you are doing as it is obviously working for you. But if anyone is getting uneven development along an edge of the sheet of film adjacent to the outside of the container, then very gentle agitation is worth a try.

Alan

Good tip.

richard

Alan Clark 14th March 2014 12:17 PM

Richard, I notice you list angling as your main interest. I used to live not too far from you and used to fish the Dove a lot. Happy days!

Alan

richardw 14th March 2014 02:30 PM

Quote:

Originally Posted by Alan Clark (Post 91542)
Richard, I notice you list angling as your main interest. I used to live not too far from you and used to fish the Dove a lot. Happy days!

Alan

I moved here from Sheffield to be on the waterside... The Dove can be a lovely river, it is only twenty minutes away over in the next valley from my "mother" river, the Derbyshire Wye.

You might enjoy this blog http://dryflyexpert.blogspot.co.uk/

Happy days indeed...
;)
richard

Alan Clark 14th March 2014 03:51 PM

Thanks for the link Richard. What an interesting site; complete with black and white photographs too. I take it you are "Regular Rod". It's the ideal thing to read through as I await the start of the trout season. (All those non-fishing types on FADU don't know what they're missing!)

Alan

Michael 14th March 2014 08:14 PM

Richard - This isn't the only thread that refers to the Orbital: there are a couple that started more recently and you can easily Search for them.

Mark J 20th January 2024 06:43 PM

1 Attachment(s)
The divided dish has been a game-changed for me, when using Pyro developer.
I just made a small one so far, for two-off 5x7" sheets. I drilled the dish and epoxied plastic bolts through from below, for a little more sturdiness. Easy to use when wearing rubber gloves, and no sign of flow-marks on negs as far as I can see ( the 5x7 sheets can move around a little, relative to the pegs, which helps) .
Next step - a bigger dish for 4-off.

Thanks Alan !


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