What is the relationship between rice paper and backing board

1, xuan paper want to keep for a long time is best framed, with cardboard or damask as the backing, pasted on a wooden backing, surrounded by solid wood as a frame, the surface sealed with glass, hanging can be preserved for a longer period of time.

2, mud rice paper board includes a backing board and set in the paper layer covering the backing board, in the paper layer surface covered with mud layer used to color, in the mud layer surface is also coated with A glue layer used to protect.