Film developing slide rule

[gunsmithing]

Film developing slide ruler

Here is one way of getting the developing time works great
A simple slide ruler for developing

All you need is the time and temperature an 68F/20C of the film and developer slide the ruler to that location. Then just take the temperature of your developer and find on the slide ruler and there is the time you need for your film.

Dave
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[lawrence]

Film developing slide ruler

Here is one way of getting the developing time works great
A simple slide ruler for developing

All you need is the time and temperature an 68F/20C of the film and developer slide the ruler to that location. Then just take the temperature of your developer and find on the slide ruler and there is the time you need for your film.

Dave
​

Very nice. If you don't have one you can use the Ilford Time & Temperature chart PDF.

 

[Sejanus.Aelianus]

I found this book in, of all places, a model railway shop!

The calculators are all circular slide rules and quite useful.

 

[bsdunek]

Right on, Sejanus.Aelianus. I use an old Kodak Darkroom Databook. But, everyone can't have one of those, so the sliderule would work.