Iwate has the about 900 years of tradition for casting. The surface of inside is pretreated against rusting by heating over 800 degree after casting. This makes a oxidised film to protect the iron surface. The outer surface is pretreated
Read MoreIwate has the about 900 years of tradition for casting. The surface of inside is pretreated against rusting by heating over 800 degree after casting. This makes a oxidised film to protect the iron surface. The outer surface is pretreated
Read More