Time Charts
STANDARD® Film Developer Time Chart
Recommended Time + Temperature Based on Film Type
To determine the proper development time for your film, locate your film type on the chart below 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.
Chart Letters
If your desired working temperature does not appear on the chart above, you may use Sprint’s Chart Letter System to determine development time for your film. To use this system, note the “Chart Letter” listed next to your film.
Once noted, this letter can be used to find a development time on our Development Timing System Chart (below).
Development Timing System Chart
Locate recommended developing Temperature/Time combination. Note chart letter and use any convenient temperature/time combination on that letter’s line for matching results. Chart is based on developing activity, which doubles with each increase of 6.66°C (12°F). Most films should remain below 25°C.
The Development Timing System Chart can also be used in conjunction with our recommended Chart Letter Adjustments (below) to determine the appropriate adjustments for changes in working solution temperature, variations in film exposure and a variety of other processing conditions.
Chart Letter Adjustments
The Chart Letter Adjustments can be used to determine the appropriate adjustments for changes in working solution temperature, variations in film exposure and a variety of other processing and printing conditions.
Note: All adjustments are in letters. For example, a Chart Letter of “Q” with an adjustment of +2 for a plastic lens would yield a final Chart Letter of “S” on the Development Timing System Chart, as shown below:
