Answer:
The oldest known type of spray paint, dating back to the late 1940s, used a binder called "aluminum stearate." Aluminum stearate is a compound composed of aluminum and stearic acid. It was mixed with pigments and solvents to create a sprayable paint formulation. This early spray paint was primarily used for industrial purposes, such as marking objects and surfaces. Over time, spray paint formulations have evolved, and different binders, pigments, and propellants are now commonly used in modern spray paint products.
Step-by-step explanation: