Chettinad's masons slowly revive centuriesold limeegg wall .
WEBJul 14, 2020 · Egg lime plastering technique. Mookkiah explains that the plaster is made by grinding three portions of sand to one portion of limestone. The dry mixture is allowed to settle for about 34 days. The masons procure conches and shells from the coastal areas of Ramanathapuram and Thoothukudi. They are powdered and added to the limestone .