This large pleated lampshade was literally shredding. It is not the first time I have restored a pleated lampshade that seemed to be pleated paper. I could tear the cover lengthwise and across the pleats. The original cover was not even stained or anything, just falling apart.
Large Pleated Scalloped Lampshade Restored with Pleated Muslin Fabric
I restored the shade with pleated muslin fabric.