Edible lye is lye flour (soda, soda ash): the scientific name of sodium carbonate, the main ingredient is sodium carbonate, the texture is rougher than the starter.

Baking soda is also called baking soda, the composition that sodium bicarbonate. Because of the similarity in color, the method of differentiation is mainly through the texture of hand rubbing.

The process of neutralizing the excess acidity in the traditional pasta fertilizer used to make the pasta is called "tweaking the alkali". The amount of alkali should be appropriate, too little is called "alkali small", then the face is dead and sour, too much is called "alkali big", then the bloom and yellow color.