Below are various microscopic pictures of a third metal-nylon guqin string set that I have tested. I was generously loaned this set to study. Currently, I do not know what brand these strings are. In addition, when I recieved these strings, I had decided to stop stringing my qin with metal-nylon strings due to the potential damage they may cause on the softer french polished finish, so I currently do not have data for these strings. These pictures are documented to provide further reference to the outer wrapping method used with metal-nylon guqin strings. You can click on each thumbnail to see the full size picture.