History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c15.s2.64

c15.s2.64

The process for the preparation of *vajra-lepa* or rock-cements consists in making a concentrated aqueous extract of finely ground fruits, seeds, flowers and barks of plants rich in gummy and resinous substances. This is then again mixed up with naturally occurring resins and resinous substances and made into a paste. The paste is to be heated and applied to the walls of temples and houses for residential purposes. It is stated that this cement will make the things on which it is applied last for a thousand years. In some preparations of *vajra-lepa* an addition of mercury has also been recommended.