Pretreatment lapisan kalebu degreasing (degreasing), mbusak karat, phosphating telung bagean.Phosphating punika link tengah, degreasing lan aman teyeng punika proses preparation sadurunge phosphating, supaya ing laku produksi, kita ngirim ora mung njupuk karya phosphating minangka fokus, nanging uga miwiti saka syarat kualitas phosphating, nindakake proyek apik saliyane kanggo lenga lan aman teyeng, utamané mbayar manungsa waé kanggo pengaruh bebarengan antarane wong-wong mau.