The main purpose of bristles is to make brushes. In addition to making paint brushes, toothbrushes, clothing brushes and other household brushes, the long bristles of more than three inches are generally used to make industrial brushes. Pig bristles are not only industrial resources in peacetime, but also strategic materials in war years. For example, in the national defense plan of the US government at that time, bristles were at the same level as arms and belonged to the important A-level arms supplies.
In the military industry during the war, from painting warships, aircraft and various military vehicles with paint, to cleaning the barrels and barrels of machine guns and cannons, bristles are undoubtedly the best tools.

The bristles with good toughness and strong adsorption are also a must-use treasure for scrubbing guns, machines and even painting aircraft, warships and cars. It can well protect the weapons from damage, so the participating countries paint the weapons with bristles, so as not to let those weapons go to the front line with bare steel bodies. The output of Chinese bristle has therefore increased dramatically.
Whose bristle has the highest international reputation? Indisputably, it is China.
Although modern China was poor and weak, domestic pig breeding was a traditional advantage. Chinese domestic pigs have always been known for their good meat quality and fast fattening. Today, the main domestic pigs in rural areas in Europe and the United States are all improved breeding from Chinese domestic pigs. The quality of the bristles taken from fine Chinese domestic pigs is of course second to none. By 1933, China had a complete system of bristle inspection and purchase and sales, and successfully realized standardized production.
In China's annual output of bristles, the United States has always accounted for more than 30%. During World War II, the demand in the United States was even greater. There were four or five hundred brush factories in the United States, and even prisons in each state had their own brush factories. Almost all the raw materials used in brush production came from China.
Since 1892, the Worcester Brush Company, based in Ohio, has been importing the characteristic bristles from China's southwest to make paint brushes, said Bill Fagott, president of the Ohio-based Worcester Brush Company. This special bristle for this specific brush type can't be found anywhere else.
Pig farmers in the U.S. are reluctant to raise such pigs because most want to have their pigs on the market within 6 months and have no intention of raising pigs that take years to reach slaughter age.
Tariffs on Chinese bristles will force Worcester Brushes to consider scaling back Ohio operations or raising prices for paint brushes.