"Some thangkas are based on historical facts and focus on major political events and activities in history. Such as the historical theme of Songzan Gambu's life. Among them, works praising the friendship between Tibetan and Han nationalities, such as the story of Princess Wencheng entering Tibet, will be painted in a prominent position in the temple. The picture depicts the historical events of the marriage of Tang and Fan in Zhenguan 15 years through scenes such as Tang's proposal, five difficult marriages and the princess's entry into Tibet. " -Quoted from Baidu Encyclopedia.
Thangkado is used to show important activities, and this time the giant panda Baitu Thangka scroll is also used to show the story of Aba Prefecture. So when judging the content, it takes the panda as the theme and looks very realistic. The materials must also be traditional costumes and places of interest in Aba Prefecture 13 counties. Look at the materials used. They are natural minerals from Tibet. These pigments are extracted from special mineral plants on the plateau, and the extraction technology is also difficult.
Using X-ray fluorescence or stereo microscope, we can check and analyze whether the pigments in Thangka scroll are really Tibetan pigments.