Excerpt: A convenient method of teaching farmers, 4-H members and students to recognize various species of Lepidoptera is now being used in Michigan with wide success. In the process, insect wings are mounted on cardboard and sealed between layers of clear plastic. The resulting "laminations" have several advantages over pin-mounted Lepidoptera, and are admirably suited for any use that requires constant handling. The finished mounts are impervious to museum pests, are dust-proof, may be cleaned with ease, and are easily stored in a loose-leaf binder. The plastic is flexible, thus danger of damage from bending is slight.
"Laminating Lepidoptera for Educational Use,"
The Great Lakes Entomologist, vol 1
Available at: https://scholar.valpo.edu/tgle/vol1/iss3/6