A collection of illustrated postcards from 1964 that were created by the Rohm & Haas Corporation. These cards colorfully illustrated the flexibility and luminosity of Plexiglas as a material for lighted signs. The original set (which I have) came sheathed in a black box with brown heiroglyphic symbols and an interior booklet which encouraged retail establishments to use Plexi for their frontage, likening our modern signage to the ancient heiroglyphics found in ancient ruins.