Amanda Knapp
Wilson basketballs are made from a combination of leather, rubber, and nylon. The process of making these basketballs involves four key components: an internal bladder, a winding layer, a rubber carcass, and a leather topcoat. The leather used in Wilson basketballs is sourced from Horween Leather Co., which uses steer hides to create the all-leather NBA basketball. The hides undergo a tanning process, embossing, and dyeing to meet Wilson's specifications. The inner bladder of the basketball is made from black butyl rubber, which retains air and provides the characteristic bounce. The outer cover of the basketball is made from leather, synthetic rubber, or regular rubber, and the panels are stitched or glued together. Wilson basketballs are tested to ensure they meet the quality standards and specifications set by the NBA, including weight and feel, to maintain the integrity of the game.
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What You'll Learn
Leather preparation
Wilson partnered with Horween Leather Co. to create the official all-leather NBA basketball. The leather preparation process involves several steps and can take about 22 working days.
Firstly, steer hides, a byproduct of the meat industry, undergo an initial chrome-tanning step to preserve the hide. Once the leather reaches the desired size and thickness for a basketball (approximately 2 millimeters), it is retanned using a blend of tree bark extracts and emulsified oils designed specifically for an NBA ball.
The leather is then dried in a pasting unit, where starch paste adheres to glass frames, allowing the leather to pass through a hot-air dryer. The drying process takes place in a large dryer, holding up to 100 hides at a time, for about four hours at 140 degrees Celsius.
After drying, the leather is surface-dyed in the NBA's signature brown color (code 863), enhancing the hide's natural grain. This step adds both aesthetic appeal and functionality to the leather.
The final step in the leather preparation process is embossing, which creates the distinctive pebbled texture on the leather. This unique texture is achieved by using a German-made plate that applies 1,000 pounds of pressure to the leather, resulting in the iconic pebble pattern associated with NBA basketballs.
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Cutting and stitching
Once the leather has been processed and treated, it is shipped to the factory to be cut into six panels. The cutting process involves dividing the leather into six isolated panels of equal size, which will eventually be wrapped around the inner bladder to form the ball's outer cover.
After the cutting process, the panels are stitched together to create the ball's outer cover. For leather basketballs, heavy-duty machines are used to stitch the panels together, ensuring a secure and durable construction. This stitching process involves carefully aligning the edges of the panels and using strong thread to create a seamless join between each panel.
The stitching process is crucial in ensuring the ball's structural integrity and performance. It requires precision and skill to ensure that the panels are securely attached and that the stitches are evenly spaced and robust. Any imperfections or weaknesses in the stitching can impact the ball's performance, affecting its bounce, shape, and overall durability.
In addition to stitching the panels together, the manufacturing process also involves assembling and securing other components of the basketball. This includes the installation of the air tubes and the inner bladder, which is made from black butyl rubber to retain air and provide the characteristic bounce of a basketball. The bladder is cut and melded to form seams, and then vulcanized to seal the rubber completely.
Overall, the cutting and stitching process for Wilson basketballs requires a combination of precise techniques and high-quality materials. The leather panels must be carefully cut to the correct size and shape, and then skillfully stitched together to create a durable and high-performance basketball that meets the exacting standards of the NBA.
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The inner bladder
After the bladder has been inflated for 24 hours, it is put through a machine that wraps it in nylon or polyester threads to help form a perfect circle and create a spherical shape. Different basketballs use different threads; for example, street basketballs use polyester threads, while professional basketballs feature nylon threads. The two-part carcass mould covers the winding layer and goes through its own vulcanization run of 150 to 160 degrees Celsius for about eight minutes. During this time, the hot rubber flows into the winding, adding structure to the ball.
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Testing and approval
The inner bladder, a vital component of the basketball, is meticulously tested for air retention and shape retention. Once the bladder is formed, it is inflated and left for 24 hours to verify its ability to hold air and maintain its shape. This process is crucial in ensuring the correctness of the inner bladder, which is responsible for the ball's bounce and spherical shape.
The leather outer cover of the basketball also undergoes a thorough inspection process. After the leather is treated, dried, and embossed with the distinctive pebbled texture, it is carefully examined to meet the NBA's criteria. The leather pieces are then shipped to a factory, where they are cut and sewn together to create the outer cover.
The final basketballs are subject to further testing to ensure they meet the performance needs of the players. One such test involves loading a single ball into a piston-powered machine, nicknamed "Scottie Piston," which pummels the ball in an up-and-down motion to mimic a power dribble. This test helps evaluate the ball's durability and resilience.
Additionally, Wilson officials closely observe players' reactions during test games, noting their expressions as they handle the new basketballs. This feedback is invaluable in fine-tuning the design and ensuring the balls meet the exacting standards of the NBA. The entire testing and approval process is designed to maintain the integrity of the game and provide players with a consistent and high-quality basketball.
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Wilson's history with the NBA
Wilson has a long history with the NBA, serving as the official ball maker for the league's first 37 years. The company has recently regained its status as the official provider of NBA balls for the 2021-2022 season. Wilson's partnership with the NBA involves creating the official all-leather basketball for the league. The ball-making process is a combination of science and art, requiring four layers of materials, each with its own defined processes.
Wilson collaborated with the NBA players and equipment managers to understand their performance needs, such as the desire for a consistent feel across different climates. The NBA is the only league that uses a genuine leather ball, which makes the production process unique and noteworthy. The leather used in the basketballs is specially treated to meet Wilson's specifications. It undergoes an eight-step process that includes embossing to create a pebbled texture and surface dyeing for stain and pigment.
The official NBA Game Ball made by Wilson is crafted with genuine leather, which requires a break-in period before it can be used in games. This break-in process is a unique aspect of the leather ball, and the oil and sweat from players' hands during drills and gameplay help to achieve this. The balls are initially stiff and rough, but with use, they darken and develop a better feel. The NBA teams have their own methods for breaking in the balls, and once they reach the perfect feel, Wilson tests them to create new data points.
Wilson's partnership with the NBA has evolved over time, with the league recently switching from Spalding to Wilson as their official game ball provider. The switch was made due to the durability, better bounce, and grip offered by Wilson balls, which are made from composite leather. The players had to adjust to the change, but they eventually grew to like the new balls. The use of leather in basketballs has also come under scrutiny due to the availability of better vegan leather alternatives and the environmental impact of animal agriculture.
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Frequently asked questions
Wilson basketballs are made from a mix of materials, including leather, rubber, and nylon. The inner bladder, which is the core of the basketball, is made from black butyl rubber, while the outer cover is made from leather, synthetic rubber, or regular rubber.
The process of making a Wilson basketball involves several steps. First, the leather is treated and tanned to give it the right thickness, colour, and texture. Then, the material is cut into panels that will be wrapped around the inner bladder to form the shape of the ball. The inner bladder is made by melting black butyl rubber into flat panels, attaching them together, and inflating them. Once the bladder is ready, nylon threads are wrapped around it to create a spherical shape. Finally, the outer cover is stitched or glued together, and the ball is tested to ensure it meets quality standards.
The process of making a Wilson basketball can vary, but it typically involves several steps that can take a significant amount of time. For example, turning blue-tinted steer hide into a pebbled sheet of leather ready for shipment can take about 22 working days. Additionally, once the leather is prepared and shipped to the factory, it undergoes further cutting, stitching, and testing before the final product is ready for distribution.
