The reagent is a solution of sodium chromate and mitric acid.The mold can be used repeatedly as proven by a surface study under the metallurgical microscope after electroforming and separation.

• 处埋液为重铬钠和硝酸之混合液，经电铸和剥离试验以金相显微镜，观察表面变化情形，发现母模之多次使用是可行的。