The colorful silks that are part of the backing, or "frame," for the portraits form an important part of the painting's history. When possible, conservators reuse old mounting silks that are in good condition and are appropriate to the painting in terms of color and age. In these cases, the silk mounting fabric is removed, cleaned, and remounted around the painting.
Sometimes the silk is simply worn or damaged beyond repair, as was the case with the portrait of Lirongbao's wife. The old mounting silk was extremely soiled and stained. It is also torn and broken, and large pieces were missing. These silk fabrics had become so weak and brittle that they no longer support the painting safely. Even after cleaning, they could still have shown signs of wear, fading, and stains. The conservator and curator decided to remove the old mounting and replace it with new silk.