Remove from heat and add the bicarbonate of soda.
Dissolve the bicarbonate of soda in a little water and add to the melted golden syrup mixture.
A level teaspoon of bicarbonate of soda dissolved in some water should be drunk on an empty stomach.
Soak them for 48 hours first, then simmer in water with a teaspoonful of bicarbonate of soda to soften.
Formerly bicarbonate of soda was made from Leblanc sodacrystals by the action of carbonic acid, but this article is now almost exclusively made in the ammonia-soda process.