1. IN A PROCESS FOR THE MANUFACTURE OF RAW SUGAR FROM SUGAR CANE IN WHICH SUGAR CONTAINING JUICES ARE EXPRESSED FROM CANE, DEFECATED, THEN EVAPORATED TO A THICK SYRUP AND SUGAR CRYSTALLIZED FROM THE THICK SYRUP THE IMPROVEMENT COMPRISING THE ADDITION OF SODIUM HYDROSULFITE TO THE SUGAR JUICE AT ANY STAGE SUBSEQUENT TO GRINDING OF THE CANE AND PRIOR TO THE DISCHARGE FROM THE EVAPORATORS.