What Is In A Ping Pong Ball

What Is In A Ping Pong Ball

Last modified: October 15, 2023


Ping Pong, also widely known as Table Tennis, is a sport that has captivated many across the globe. At the heart of this thrilling game lies a simple piece of equipment – the ping pong ball. But what exactly comprises this seemingly straightforward sporting accessory? Let’s take a deep dive into the composition of a ping pong ball!

The External Casing

One major component of a ping pong ball is its outer layer, typically known as the casing. This part plays a significant role in determining the ball’s performance including its bounce, spin, and speed.

Materials Used

Traditionally, ping pong balls were made from celluloid. This plastic-like material is lightweight, resilient and has a good bounce, all qualities needed for a reliable ping pong ball. However, due to its flammability and environmental concerns, since 2015, the use of celluloid has been replaced with a non-flammable plastic polymer called Polyvinyl Chloride, commonly known as PVC or ABS.

Thickness and Seamless Design

The standard thickness of ping pong ball casing is about 0.86 millimetres, just enough to provide the perfect bounce without making it too heavy. The seamless design ensures a consistent bounce and flight path during play.

Color and Finish

Ping pong balls are typically white or orange, depending on the color of the table and its surroundings. The matte finish ensures that the players can clearly see the ball without any distracting glares.

The Internal Pressure

The inside of a ping pong ball is just as important as its exterior. The fact that it’s hollow might make it seem uninteresting. However, the internal pressure is a major factor affecting the performance of the ball.


The primary component inside a ping pong ball is simply air. This allows the ball to be light enough (about 2.7 grams) to bounce off the table and fly at high speeds.

Pressure Balance

The pressure inside should match the atmospheric pressure. This balance gives the ball stability and helps maintain a consistent bounce and trajectory during gameplay.

Adjustment to Altitude

The internal pressure of a ping pong ball can be adversely affected by high altitude. Some manufacturers alter the pressure to account for games played at higher altitudes to maintain the performance.

The Manufacturing Process

Understanding how a ping pong ball is made can help illuminate more details about its composition. It’s a process that requires precision and consistency.


The process begins with a sheet of plastic being heated and molded into two half spheres. These halves are combined to form the hollow ball.

Polishing and Testing

Once the halves are joined, the ball is polished to remove any visible seams and provide it with a smooth finish. It is then tested for weight, size, rebound, and hardness to make sure it is up to the standard.

Final Approval

The balls undergo final inspection before being approved for play. The International Table Tennis Federation (ITTF) must approve balls for official tournaments, ensuring they meet all technical standards.


In conclusion, the humble ping pong ball is much more than meets the eye. A combination of specific materials, meticulous manufacturing processes, and precise internal pressures creates a perfect sphere capable of providing countless hours of thrilling gameplay and excitement. It’s no wonder that such a seemingly simple piece of equipment can play such a significant role in one of the world’s most popular sports. Next time you hear the unmistakable sound of a ping pong ball bouncing off the table, remember the complex composition and engineering that contributes to every swift spin and swift swing!

Additional Ping-Pong Resources:
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