我选的是 titanium "Since manufacturing a durable corrosion- and defect-free coating for such studs is extremely difficult, medical literature considers only implant grade (ASTM F138) steel and titanium (ASTM F67 and F136) to be appropriate for piercing stud composition."
stainless steel, sterling silver, 10k/14K金都可以。你要是不想机打,就是纹身店做手穿。
我选的是 titanium
"Since manufacturing a durable corrosion- and defect-free coating for such studs is extremely difficult, medical literature considers only implant grade (ASTM F138) steel and titanium (ASTM F67 and F136) to be appropriate for piercing stud composition."
当天就能洗澡洗头。。。