The application of colour to the thangka canvas
involved two main steps first, filling in the areas of different base colours, and second, the subsequent shading
and outlining of those areas.
To these steps there corresponded the two essentially different types of paint in the Tibetan
(rdo tshon and sa tshon) and
The organic dyes or lakes (tshos)
The mineral pigments had to be mixed with a binder
before being applied as paints. .