History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c20.s3.t1.16

v1.c20.s3.t1.16

Since different types of ochres, haematites, and local mud etc. were used for slips and also for painting the potteries, it is evident that methods like filtration, decantation, rubbing on a slab of granite with water, boiling with some other ingredients like calcium, *khadira* (catechu), soda etc., collecting barks and leaves from particular trees and allowing them to sour by adding rice starch etc. were adopted in preparing the pigments.