with a frame. If the content of the picture is classical, it is suggested to use a border with antique logo; The picture effect is relatively modern. It is suggested to use a straight line and a simple metal border. Of course, log-style borders are also very popular now.
As far as I know, Thangka was painted by grinding various mineral powders, and then painted with gold powder in some places. Generally, this kind of products are more expensive, and the method adopted is to make vertical shafts at both ends and then hang them on the wall where sacrifices are prepared. Of course, some of them are directly made into a big frame and the whole Thangka is sealed inside. Because it has been exposed to the air, the silk color of Thangka will fade slowly, and it will be much better if it is completely sealed.
It's the first time I've heard of Thangka with oil painting pigments. If so, let's use oil painting to stretch cloth and frame it. Because it must not be Thangka's cloth painted with oil paint. (If the oil paint leaks from the back of the cloth, it will lead to mildew, and the selected cloth will rot, so the cloth painted with oil paint must be treated as an oil barrier.)
Stretching the inner frame with an outer frame with complicated patterns is more in line with the style characteristics of Thangka.
I hope I can give you some advice.