Lye noodles (soda, soda ash): scientific name sodium carbonate chemical formula Na2CO3 lye noodles, is edible alkali, the English name is dietary alkali, the main ingredient is sodium carbonate, the texture is rougher than the starter. Because of the similarity in color, the method of differentiation is mainly through the texture of hand rubbing. It is used to neutralize the excess acidity in the traditional pasta fertilizer, a process known as "speculation of alkali". The amount of alkali should be appropriate, too little is called "alkali small", then the noodles are dead and sour, too much is called "alkali big", then the bloom and yellow color. If you use commercially available active yeast to make noodles, you basically don't need to neutralize the alkali. Alkaline flour in the boiling porridge discretionary put some can increase the viscosity, often drink this porridge especially for people with stomach acid is good, and do not have to go to special and what soda drink. This is like eating a variety of vegetables do not have to specialize in buying vitamin pills, is a good way to food instead of therapy.