The pastel is matted with a 12 ply mat, the whole sheet exposed, and glazed with laminated, UV shielding, non-reflective glass. Pastels should always be protected from ultra-violet light.
This approach, to use a section of the profile drawing, is one that we have followed with Degas’s designs before. An example of a Degas corner we made is shown below in section and plan, next to the drawing from Degas’s sketchbook. When Jed Bark looked through Degas’s sketchbooks at the Bibliothèque Nationale in 1999, he was surprised to note that the drawing in Degas’s hand was 4 ½” wide, clearly drawn to be translated directly by the framemaker into a frame. We don’t know if this profile was ever actually fabricated; there are none like it in existence.
We have occasionally used the whole profile as drawn, but more often we have made frames from the inner two sections.