Final answer:
The collodion method is a chemical method used to develop latent fingerprints on old paper. It involves fixing gun cotton onto a glass plate for shorter exposure time and clearer image.
Step-by-step explanation:
The chemical method of developing latent fingerprints that has been used to develop prints on old paper is the collodion method.
The collodion method involves fixing a substance known as gun cotton onto a glass plate. This process allows for a shorter exposure time and a clearer image.