Gold grains or the silver grains from refinery operation are dried and weighted according to the size of the bars to be made.
Traditionally gold and silver bars have been made by manual pouring into moulds.
IKOI developed and patented the first tunnel furnace for the production of bars, from 50g to 1000g: the Flameless Tunnel®.
Over the years, more than 110 flameless tunnels have been installed worldwide, making IKOI the reference point for cast bars equipment.
When the cast bars are made, and after a weight check the logo, then the fineness, the weight and the serial number are printed on the bars. These operations can be manual or completely automated by IKOI.