Lead soaps in paintings: Friends or foes?

摘要: The origin(s) and role(s) of metal soaps in paints are a worldwide concern today. These hybrid compounds, containing both fatty acid chains metals associated with carboxylate function, increasingly identified paints. As reviewed the first part this work, presence is differently interpreted scientific publications: sometimes considered to play positive role as anchor points, during paint drying processes; they can also be responsible for many degradation processes (protrusions, efflorescences, darkening, etc.). Their origins various ways. In some paintings (in particular from twentieth century), have introduced on purpose, additives, modify physical properties painting materials. older paintings, usually thought result an uncontrolled reaction oil lead-based pigments, lead white, red lead, tin yellow. ...