For example,cupellated silver that was the best silver (pure silver) by refining method at that time was bought by keicho-chogin by adding 10 % in ginza, and it was called "10% addition".
たとえば当時の製錬技術で最高の上銀（純銀）とされた地金すなわち灰吹銀は、一割り増しの慶長丁銀で銀座に買い取られ、「一割入れ」と呼ばれた。