1, the material is expensive. In order to ensure the pure color of the painting, natural minerals or precious stones are mostly used as pigments, and pearls, agates, gold, lapis lazuli and other precious jewels and jade are generally used.

It takes a long time to paint. A black gold Thangka, from the selection of canvas to the opening, was independently completed by a painter. Making a Thangka takes as short as six months and as long as more than ten years.

There are few excellent painters. Painters should systematically learn to draw Thangka, including measurement and sketch. Therefore, it usually takes 8 years to 14 years for a painter to start painting independently.

4. Less blessing attributes. Generally, Thangkas with blessing attributes are painted by lamas, but in addition to painting Thangkas, lamas have to practice Buddhism and chanting, so the number of Thangkas painted by a Lama in his life is very small.

Extension:

Black gold thangka, also known as black thangka, is a mysterious and profound painting form with black as the background, outlined with pure gold and dotted with a small amount of colors or symbolic smudges to show the main structure and light and shade of characters and scenery. It comes down in one continuous line with the painted Thangka in Tibetan Buddhist art, and is self-contained. In Tibetan, it is called "Donna".