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Permanent Roundness test
Only a perfectly round ball allows a player to fully capitalize on his skills. The more perfect the sphere is, the more balanced a ball will be in flight, the higher will be its accuracy and the predictability of its flight.
The diameter of the ball is measured in 16 different places, after which the average is calculated. The difference between the highest and the lowest diameter must be within very strict limits.
Water Absorption test
A wet and heavy ball behaves quite differently from a dry one. It flies through the air more slowly, has a low bounce and is more difficult to curl.
For the water absorption test, the ball is pressed and rotated in a container of water 250 times, after which the ball will be weighed. The water will also be weighed before and after the water uptake test.
Weight test
Each professional game is played with a number of balls. These different balls all need to perform the same. Consistency in weight is crucial. If the ball is too light or too heavy, it might move unexpectedly in flight.
Uniform Rebound test
Players need to be able to anticipate how the ball will respond in order to control a pass using their chest, thigh or foot.
For this test, the ball is dropped ten times onto a steel plate from a height of 2 meters. The difference between the highest and the lowest bounce must be no more than 10 cm and the height of all bounces must be:
Loss of Pressure test
If the ball loses air during the game, it will be difficult to predict and may not respond consistently, making long passes and deep crosses almost impossible.
For this test, the ball is inflated fully and three days later its air pressure is measured. It must not have lost more than a specified percentage of its air.
Shape & Size Retention test (only for FIFA Approved)
During an average game the ball is kicked approximately 2,000 times. However, in the last minute of overtime, the ball needs to perform identically to the way it did in the first minute of the game.
In order to test the shape and size retention, the ball is fired against a steel plate 2,000 times at 50 km per hour for the FIFA Approved hallmark. After this test, only minimal changes in air pressure and roundness are allowed and the air valve and stitching must remain undamaged.
Tests are conducted at room temperature of approximately 20°C and 65% humidity.
So, do really the FIFA Approved or FIFA Inspected marks guarantee the highest quality possible in soccer balls?
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