Prepare your developer and fixer solution in two trays. You can do this outside of the darkroom if easier as the solutions themselves are not light sensitive.
Follow the instructions on the back of your developer solution to dilute the solution to the appropriate amount. Generally the multigrade developer is diluted 8 parts to 1 with water. The fixer is diluted 3 parts to 1 with water. Use trays that are suitable to bath the photo paper lying flat in at least 1/2" of the diluted solutions. *Be sure to take note which tray has the multi-grade developer and which has the rapid fixer!
Ensure the shutter remains closed and the pinhole camera tube is not opened until you return to your dark room. Back in the dark room, ensure you have your developer solution, rapid fixer, trays, and tongs/gloves ready. A paper towel or two is also helpful to rest the photos on to dry.
Ensure the dark room is fully sealed off from light again and the red light app is in use. You can now open the top of the tube and take out the photo sensitive paper.
Bath the paper in the multi-grade developer solution. You should start to see the paper darkening and changing into the negative in a few seconds if it was dramatically exposed. Or it may take a couple minutes if the image was less exposed. Be sure not to over develop the image. Hold near your phone/red light app to assess how things are progressing. *Note, don't hold too close to the red light app or have the light shine too aggressively on the paper as sometimes there can be a bit of seepage of normal light coming through the smartphone screen.
Once you feel the photo is appropriately developed. Bath in the rapid fixing solution for around 30 seconds or more. Your photo is now no longer light sensitive. Remove and pad dry with the paper towel (the negative will not smudge).
You now have your negative!
- Ilford Developer & Fixer Solution
- Kitchen tongs or gloves
- 2 bowls, trays or tupperware containers