What is the best material for painting and calligraphy mounting frame?

It depends on the style of the mirror heart painting and calligraphy you prepared. If it is very traditional calligraphy or Chinese painting, it is recommended to choose dark wooden frames such as brown and red, or consider using rounded corners, which is more beautiful. If it is a more modern style or western painting, you can learn from decorative picture frames or oil painting frames. Of course, it depends on your own aesthetic taste. You can consult and discuss with the painter who makes the frame. For reference only.