... ,powder coating 3.Rivet technology Assembly line production plastic folding chair.For this style chair:First,we producing it by Assembly line production ... One 40"HQ(5030pcs) in 3-5 days.Second,the steel frame is treated by Electrophoresis then powder coating,this is ... the characteristics of our producing technology, we can guarantee the chair is not rusting at least 5 years.Third,the back ...