도금 되는 면적이 1cm2 되도록 punching 하였고, 도금액이 스며들지 않도록 고안된 홀더에 장착하여 사용하였다.
It was punched so that the area to be plated was 1 cm2, and it was mounted on a holder designed so that the plating solution did not penetrate.