As early as 1885, it was found that strained rubber is liable to crack during aging. People used to believe that it results from sunniness. But later, they have found the same cracking also occurs on rubber products free of sunlight. In the end, after being analyzed, people solved the puzzle that the ozone in the air leads to the cracking of rubber which is not exposed to the sunlight.
Although ozone accounts for little in the air, it is the core reason for material cracking in our life. With the extensive development of rubber products, more and more industries have been attaching importance to critical factors of rubber deterioration. It has significant meaning to extend the service life of finished products. The ozone test chamber is an indispensable rubber testing machine to help in researching and developing countermeasures to cracking.