I use the four flap enclosures for all our lantern slides where the image is secured between two pieces of glass. We do not have any glass negatives. If you have “Photographs and Negatives” from the Bookshelf collection on page 241 there is an illustration for making a housing package for loose plates from the bottom – 4 ply board, photographic plate, mat then glass. the mat protects the emulsion side. A stable tape is wrapped around the four sides and onto the front and back. the tape should not come in contact with the photographic plate.
