Tesaurus d'Art i Arquitectura Getty Institute 0000-00-00 2024-01-24 15:40:44 en wet collodion negatives300134674collodion negativescollodion negatives, wetcollodion photonegativescollodion wet plate photonegativescollodion wet-plate photonegativesnegatives, wet collodionwet collodion glass negativeswet collodion negativewet collodion plateswet plate negativeswet plate photonegativeswet-collodion glass negativeswet-collodion negativeswet-plate negativeswet-plate photonegatives Negatives produced by the wet collodion process.The glass plates remain wet with silver iodide droplets during exposure to light. These negatives are created by pouring collodion onto a clean piece of clear glass to produce an even coating. Before the ether and alcohol evaporates from the collodion, the plate is dipped into a solution of silver nitrate in a darkroom. The silver nitrate bonds with the potassium iodide in the collodion to produce light-sensitive silver iodide. After exposure the plates are developed in a solution of pyrogallic and acetic acids, washed, fixed, dried and varnished. negatiu al col·lodió humit negativos al colodión húmedo 2026-03-30 20:26:32