Before revision: With the now ready mixture of lime and volcanic cinders, they would apply three-layers of qadad-plaster to the walls of cisterns to make them impermeable; the first layer having the largest particles of volcanic cinders (scoria) and the least amount of lime was applied to rough stone, the plaster being added to a thickness of about two inches.
After revision: ApplicationWith the now ready mixture of lime and volcanic cinders, they would apply three-layers of qadad-plaster to the walls of cisterns to make them impermeable; the first layer having the largest particles of volcanic cinders (scoria) and the least amount of lime was applied to rough stone, the plaster being added to a thickness of about two inches.