Asphalt-based asbestos floor tiles and later, plastic or vinyl-based asbestos flooring were popular in the U.S. in the 1940s-1970s and were produced by some manufacturers (Armstrong) as late as 1980. Some asbestos-containing flooring products were manufactured by companies (we estimate) as early as the late 1920s. from> https://inspectapedia.com/hazmat/Asbestos-Floor-Tile-Identification.php The Waxing Process - The janitorial company applied the wax, and when it became worn or yellow, waxing crews used ammonia to remove the wax. It was a messy process, as in most cases, applied with mops and buckets. The ammonia was agitated with the mop, then rinsed with clean mops and water. There was splashing on the baseboards, and a little on the walls, the new coats of wax were then mopped on with a cotton mop. The stripping and waxing like this continued through the '70s and early '80s. The addition of floor machines used to agitate the wax. The wax is mopped up or picked u...
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