How can you find development times when you find yourself with an urge to develop your black and white negative, but no Internet network and no access to the Massive Dev Chart? Or how about when there is a brand new film on the market which is not available in the development chart at all? Or perhaps it is, but not with your preferred developer?
We got you covered! Here, you can find a useful method to calculate your developing time safely to work on your black and white film. All you'll need are some tools that you usually have when you’re self-processing your film.
For this tipster, we used Lomography’s Lady Grey 400 for the strip and Kodak HC-110 as a developer.
Other tools you’ll be needing are:
- a graduate cylinder
Procedure and Calculation
The Dilution B is what we used from Kodak, and I have cut the ratio from 300 ml total to 150 ml total to minimize the waste of the developer. The measurements are as follows: 19 ml of HC-110 and 131 ml of water.
Once you have all of your tools ready, you proceed with dipping your piece of film halfway into the solution; while simultaneously starting your timer. Stop the watch as soon as the film strip becomes dark.
Divide the time you got into three. This will indicate the number of minutes needed to develop the film.
We ran this test three times. The most accurate time was the first that we got which was 17.02 seconds. When divided by 3, this gives us 5.6 minutes. The developing time we officially recommend for this film is 5.5 minutes. We also got 18.16 and 19.00 seconds with previous tests: this difference is still minimal and it won't affect your results. It could however increase the contrasts.
Here, you have an easy and quick way to find your developing time just in case you'll end up with no chances to check the charts, or if you are in possesion of a brand new film. We hope you enjoyed this tip, and find it handy for your next film development.
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