Mix the chemicals in the processing kits using the instructions on the packs and store them in gallon containers. Kits vary, depending on the film. Place the container in boiling water to heat the chemicals. Ensure the chemical temperatures are at 100 degrees Fahrenheit, or 37.8 degrees Celsius.
Mount the film on a film reel in a dark room to prevent the film from being exposed to any light. Place all the tools you need in front of you to avoid tripping.
Place the reel in a developing tank that is lightproof. The hole at the top of the developing tank does not allow light into the tank.
Place the developing tank next to the chemical container. Check the temperatures of the chemicals. If it is above 100 degrees Fahrenheit, wait for it to cool; if it is below, increase the water temperature.
Pour the developing chemicals into the developing tank with a stopwatch in hand. Agitate the developing tank every few seconds for 3 minutes, 20 seconds in the shallow pans. Agitation ensures the film encounters fresh chemicals every few seconds. After 3 minutes, 20 seconds, pour the developing chemicals out. Store them carefully; you can reuse them.
Fill the developing tank with bleach and start the stopwatch. After 6 minutes, 30 seconds, pour out the bleach. Uncover the developing tank and place it under running water for 3 minutes, 30 seconds.
Pour out the water and with a stopwatch in hand pour in the stabilizer for 6 minutes, 30 seconds, then pour it out. Rinse out the film.
Run 100-degree water into the developing tank to wash out the chemicals from the film. Empty the tank every few minutes and keep the water temperature at 100 degrees. Repeat these steps for at least 10 minutes.
Lift the film from the tank and shake off any water. Unwind the film from the reel; avoid touching the film by holding it at the edges. Hang to dry for about two hours at room temperature. Your negative is now ready to print.