在金属铸币中,由于铅的熔点低,抗腐蚀性强,容易加工,成为清末民初各商会、私人钱庄、店铺等铸造代用币的首选。加上当时开采能力有限,铅的使用地方又多,故铅也就成为一种稀缺的金属材料。为此用铅铸造的代用币的大小通常与小平钱相当,若过大过厚不但占用材料多,而且在使用过程中显得累赘不便;若太小太薄又因材 In the metal coin, due to the low melting point of lead, corrosion resistance, easy processing, become the end of the Qing Dynasty and early Republic of China chambers of commerce, private banks, shops and other coins casting the preferred choice. Coupled with the limited mining capacity at that time, the use of lead and more places, so lead has become a scarcity of metal materials. For this purpose, the size of substitute coins cast by lead is usually equivalent to that of Xiaoping. If it is too thick, it will occupy more materials and cause inconvenience in the process of use. If it is too small and too thin,