In brick workshops, sodium carbonate is used as a shredding agent to reduce the volume of water needed to form clay. It is also used to make instant pasta. Sodium carbonate is a food additive (E500) that is used as a pickle regulator and as a stabilizer. Sodium carbonate is also used in the manufacture of ice cream. The feeling of coolness and carbonation is the result of a warming reaction between sodium carbonate and a weak acid (usually selected as citric acid), which results in carbon dioxide being produced when the ice cream is soaked with saliva. Sodium carbonate is also used to eliminate mold or other materials.