Sometimes, instead of replacing or covering a damaged or fragile patch with a replacement, the patch is stabilized and protected with crepeline. This is a choice that might be made when a particular fabric in the quilt has significance to the owner — a favorite dressmaking fabric, for example, or an apron remnant.
Crepeline is a very fine see-through silk material that is used in a variety of conservation, restoration, and artistic applications. Individual threads in the material are smaller in diameter than a human hair.
It is laid in side by side, just as I explained in an earlier post.