Liquid Chemistry
For Black and White Films and Prints
Q: How do I find the development time for my film?
To determine the appropriate development time for your film, select the desired film from our STANDARD Black & White Film Developer Time Chart and read across to the column headed by your desired working temperature. The number listed at the intersection of your selected film and desired working temperature is the development time for your film.
If the necessary working temperature does not appear on this chart, note the “Chart Letter” listed next to your desired film. Once noted, this letter can be used to find a development time on our Expanded Time Chart. This chart can also be used to determine the appropriate adjustments for changes in working solution temperature, variations in film exposure and a variety of other processing conditions.
For example, Kodak Tmax 400 is assigned chart letter “P” and should be developed for 11:30 minutes at 68 degrees F. Kodak Tmax 400 can also be developed for 9:15 minutes at 71.5 degrees.
An abbreviated version of this list appears on our film developer product labels.
