Mountain golds purchased from gold mines, old gold coins and imported gold ingots were melted, and then salt and sulfur were added thereto to react with silver included in gold and then refine to produce a certain carat of pure gold.
金鉱山より買い入れた山出金、古金貨、輸入印子金などを鎔解し、塩および硫黄を加えて含まれる銀と反応させ精錬して一定の品位の焼金とした。