This paper describes a technique for creating customized, thick (= 1 mm) slide labels, and fastening them permanently to slides so they can be stored vertically by stacking or horizontally like cards in a file without putting pressure on the coverslip. After 20 years, thick labels created by this technique have shown no sign of degradation; labels fastened to slides with silicone caulking have remained securely attached. A storage system, using insect drawer sized trays that hold large numbers of thick labelled slides, is shown. The use of thick labels and such a storage system simplifies the curation of large numbers of slides.
Voegtlin, David J.
"A Method for Making Customized, Thick Labels for Microscope Slides.,"
The Great Lakes Entomologist, vol 32
Available at: https://scholar.valpo.edu/tgle/vol32/iss3/6