Li Tie Chao monitors
the color of a wall painting to evaluate changes in pigment over time.
At the Mogao Grottoes, artists used minerals such as iron oxide for red
pigment and malachite for green pigment. 3
of 5 
|
|
|
Li Tie Chao monitors
the color of a wall painting to evaluate changes in pigment over time.
At the Mogao Grottoes, artists used minerals such as iron oxide for red
pigment and malachite for green pigment. 3
of 5 |