: A simple solution of water and lemon juice or vinegar.

: While commercial fixer is best, a strong salt water solution is sometimes used for pinhole photography. Basic Timing Guidelines Average Time Developer 1–2 minutes Brings out the image Stop Bath 30 seconds Halts development Fixer 2–5 minutes Makes image light-safe Wash 5–10 minutes Cleans the paper

: Neutralizes the developer to stop the chemical reaction instantly.