In the old days, these coppers would have been used to boil the cane juice into a concentrated syrup and then a raw sugar that would have been refined in England. Today, the estate makes no sugar, so they simply boil the juice to increase the Brix level and drop out impurities using calcium hydroxide (lime).
Inu A Kena 
In the old days, these coppers would have been used to boil the cane juice into a concentrated syrup and then a raw sugar that would have been refined in England. Today, the estate makes no sugar, so they simply boil the juice to increase the Brix level and drop out impurities using calcium hydroxide (lime).