Soccer Ball Quality Control Process & Tests

Complete Guide to Soccer Ball Quality Control Process - We focus on quality assurance in all the business aspects right from the purchase of raw materials till the delivery to our customers. Specially, after finishing soccer balls production our In-House comprehensive tests are listed in this section.

TEST # 1 - CIRCUMFERENCE

The circumference of ball must be the same all round so that is can predictably. The diameter of ball is measured at 10 different points and the mean circumference is taken. The mean calculated must lie with in the range 68.0 - 70.0cm, inclusive.

TEST # 2 - ROUNDNESS

A slightly uneven seam can change the ball shape by a fraction. In this test the diameter of the ball is measured at 16 points and the mean diameter is calculated. The difference between the highest and lowest diameter must not be more than a percentage of the mean diameter. i.e.2%

TEST # 3 - REBOUND

The ball is dropped 10 times on a steel plate from a height of 2 meters. It must bounce between 115 - 165cm inclusive. The difference between the highest and lowest bounces must not be more than 10cm.

TEST # 4 - WEIGHT

Each ball is weighed 3 times on a bean balance in a sealed cabinet. The cabinet is sealed to prevent droughts affecting the measurement. Balls should weigh between 410 - 450grams, inclusive.

TEST # 5 - WATER ABSORPTION

This test turns and squeezes the ball in a tank of water 250 times. Balls must not absorb more water that adds 15% to its initial weight.

TEST # 6 - LOSS OF PRESSURE

A ball which loses pressure during a game is difficult to predict and performs erratically. For this test the ball is inflated to pressure of 1.0 bar and in 72 hours must lose no more than 25% of air.

TEST # 7 - SHAPE & SIZE RETENTION

In this test the ball is fired 2,000 times against a steel plate at 35 miles an hour. The seams and air valves must be undamaged, and the loss of pressure, or deviation in the ball's circumference and roundness, must be minimal.