noun🔗Share火棉胶 A syrupy solution of pyroxylin in alcohol and ether that evaporates on a surface to form a clear elastic film; used in surgical dressings, photographic plates and lacquer paints."The old-fashioned photographer used collodion to coat the glass plates before taking a picture. "那个老式摄影师在拍照前会用火棉胶涂抹玻璃底片。medicinematerialsubstancechemistrytechnicalscienceChat with AIVocabulary GamePractice Reading
