It is necessary to clarify certain questions connected with the various kinds of sugar, since many people are not sure of the difference between unrefined cane sugar and refined white sugar. In fact, it has been said that brown sugar (unrefined cane sugar) is treated with sulphur and is therefore no less detrimental to health than refined white sugar, which has been bleached and dyed for the purpose of preservation.
However, white sugar is dyed solely to enhance its whiteness, not to make it keep longer. This is done following the same principle as is applied in the manufacture of washing powder, to which is added ‘blueing agents’ to make the linen appear whiter than it actually is. Without this addition it would soon begin to look greyish. Sugar keeps indefinitely on its own and needs no preservative. If stored correctly, it will last a hundred years and still be sweet. It is ‘blued’ for eye-appeal and for no other reason.
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