tennis would present a full-color parade of styles for the next four decades. What about the ball? It also became colorized in ’68. That year, Penn introduced what it called an “optic yellow ...

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Most wool dryer balls are white, cream, or light grey wool that is not dyed. It is possible for new neon-colored tennis balls to transfer dye to wet laundry. Tennis balls have less give than a ...

What are tennis balls made of? Modern tennis balls are made of a hollow rubber core, covered in a wool or nylon shell which is known as the nap. Pressurised air inside the rubber core makes the ball ...