One remarkable characteristic of the pigments of Regong Thangka is their longevity. Many ancient Thangka paintings have survived for hundreds of years while maintaining vibrant colors.
This durability is largely due to the natural mineral pigments used in traditional painting. Minerals such as azurite and malachite are chemically stable and resistant to fading. Unlike some synthetic dyes, these minerals do not easily break down under light exposure.
The preparation process also contributes to the longevity of the pigments of Regong Thangka. By grinding minerals into extremely fine particles and purifying them carefully, artists ensure that the pigments are smooth and stable.
The use of natural animal glue as a binder also strengthens the paint layer. This adhesive allows the pigments to bond firmly with the canvas surface.
In addition, Thangka paintings are often stored carefully in protective silk brocade frames. When not displayed, they are rolled and stored in safe environments, which further protects the pigments.
These factors combined explain why the pigments of Regong Thangka remain vibrant even after centuries.