https://www.pfonline.com/atom/zones/powder-coating-basics Despite the effect of several years of worldwide economic slowdown, the powder coating industry continues to grow in North America with an average annual rate (in pounds produced) of 12 to 15 percent. This rapid growth of powder coating has put a strong demand on equipment suppliers to develop more efficient ways of applying powder coating. The purpose of this section is to provide an overview of powder application technology and variables that affect first-pass transfer efficiency.