Why are car tires black? ?Why are Tires Black

The
rubber tires were originally white, which is the natural color of rubber. So what led to its change of color to black early in the beginning of the twentieth century?
 
Tires, if left in the air, will dry out, discolor and eventually crack and splinter, a problem that costs several million users of mobile homes, boat trailers, and classic car owners and stays in place for a long period of time.

The main reason for the deterioration of tires, rubber products and synthetic rubber is ozone, which is an odorless gas that is part of the air we breathe. When it combines with UV rays (the invisible part of the sun’s rays) it begins to attack the material the tire is made of.
 
To protect against ozone damage and ultraviolet rays, a stabilizer is added to the frame material. This material absorbs ultraviolet rays and turns it into heat, which is dispersed without causing any damage to the tire. All tire manufacturers use the same material, which is carbon black. That’s why all tires are black. In addition to protecting the black carbon of the tire from the damages of ultraviolet rays and ozone. It also increases the durability and strength of tire rubber, and increases its wear resistance, which leads to an increase in the service life of the tire.
 
When the tire is kept in a fixed position for a long time (mobile homes, boat trailers, classic cars), this material with the length of its interaction with ultraviolet rays transforms and loses its ability to perform its task, and its color turns gray. this is one of the reasons of change the color of the frame with the time. With the passage of time, the ability of this material to interact decreases and the deterioration of the tire condition begins to accelerate, which leads to dryness of the tire, discoloration, and cracking.

To protect the tire from ozone damage, tire manufacturers have also added a wax compound to the tire’s formulation. The process of denting the tire as it rotates, pushes the wax particles to the surface. This forms a barrier between the air (ozone and oxygen) and the tire material. This is called blooming.
 
There are also car care products on the market, which are sold to protect the tire and reduce the effect of ozone and UV rays. The material is sprayed on the tire to act as a sunblock for vacationers.