The material is called Torginol Vinyl Chip seamless flooring. Colorful vinyl chips are embedded in liquid resins creating a custom-made coating. This unique texture enhances Torginol's outstanding qualities of durability, waxless beauty, and easy maintenance. Although it is used extensively in commercial environments such as schools, hospitals, restaurants, and other "high-traffic" public places, it was very popular in the '50s and '60s as an alternative to residential linoleum and vinyl.
Torginol floors don't require hard scrubbing because dirt releases from the surface quite readily with only damp mopping. If you need a tougher cleaner, use a mild or pH-neutral cleaner. Waxing is not recommended, as it attracts dirt, making the floor more difficult to keep clean.