Considering the bibliographical information, in which it is mentioned that the printing negatives have deposited silver salt in colloidal form, it was proposed, and it was decided to execute an experimental project, consisting of recovering silver contained in the radiographic plates following 3 Comparative methods, and see which methodology has the highest extraction, evaluated and compared. In the first method, the silver salts of the plates were attacked with an aqueous solution of sodium hydroxide, allowed to react, and then neutralized with a solution of hydrochloric acid, forming silver chloride which separated. In the second method, the silver salts of the plates were attacked with sodium hypochlorite (commercial bleach), where they were allowed to react and the silver salts were converted to silver chloride which precipitated and separated. In the third method, the plates were at...