Edible lye noodles is a mixture of soda ash and baking soda, baking soda is a manufactured product from the solution or crystals of soda ash after the absorption of carbon dioxide, edible lye is not a condiment, mainly used to neutralize the acid produced by the fermentation of yeast in the dough.

Soda ash is widely used in food processing such as noodles, bread, steamed bread and so on. Soda ash can neutralize the organic acids or sulfides that adhere to dark green vegetables due to overspray of pesticides, thus preserving the original color of the vegetables and removing the contamination of pesticides on the vegetables.