The main active ingredients in Sonett’s Tablets for Dishwashers are sodium carbonate, silicates, and sulphated castor oil. Silicates are obtained by fusing sand with sodium carbonate and, thanks to their alkalinity, are capable of modifying grease on dishes by saponification, thus making it water-soluble. These silicates make stuck-on food leftovers swell, thus loosening them. Sodium carbonate, manufactured from common salt and lime, disperses the grease into fine droplets, thus supporting the fat-dissolving property of the silicates. By adding small amounts of sulphated castor oil, the surface tension of the water is reduced, resulting in the dirt being wetted more easily by the water. Sulphated castor oil, also called turkey-red oil, is obtained by the direct reaction of castor oil with sulphuric acid. In addition, the tablets contain bleaching oxygen (sodium percarbonate). During the washing cycle, sodium percarbonate releases oxygen, in addition to water and sodium carbonate. The oxygen thus released serves to remove tea and coffee residues from glasses and cups. Sodium percarbonate is a molecular complex obtained by hydrogen peroxide adsorbing on to sodium carbonate. Citrate, obtained by fermenting sugar-containing by-products such as molasses, is added to the dishwasher liquid to bind lime in the dishwashing water and to protect the machine from deposits.