Ret, a commercial dye fro fabric, can be used. See handout on toning for more details. Experiment with bleaching using household bleach or Farmer's Reducer, applied with a number O or smaller brush. Bleaching can provide accents in highlights areas or be used to create white areas within an area of a dyed print. Experiment using different types of films and combining the results with handcoloring technique.
Some possibilities are infrared film.
Use a Wratten No.25 red filter on the lens, Kodak Recording film can produce some interesting results. If the aesthetic interpretation of the subject calls for visibly heightened grain, this film can produce the effect in normal or high contrast tonal range. Available in 36 exposure cassettes and 125 foot rolls. High-contrast Litho film may interest some students who want high contrast images. Some students may want to work with the pinhole camera using paper negatives and then contact printing the image for handcoloring purposes.