A kind of ramen agent, commonly known as Peng Hui, was added to Lamian Noodles in Lanzhou. plant ash was obtained by burning grass growing in the desert, and its main component was carbonate. Due to the influence of soil geographical conditions, natural ash may contain some heavy metals. Due to the low output and uncontrollable quality of natural Peng ash, it can't meet the demand of Lamian Noodles market. So now the most commonly used is the manual Lamian Noodles.

Peng ash, as an alkaline substance added to Lamian Noodles, can change the cross-linking degree of gluten, make dough more gluten-free, and the pigment in flour will appear light yellow under alkaline conditions. Lamian Noodles's quantity is very small. If used excessively, the noodles will become hard, the color will deepen and the taste will become worse. Therefore, there is no need to worry about excessive addition of Peng Hui.

Extended data:

In 2000 and 2003, Gansu Provincial Bureau of Quality and Technical Supervision issued Lanzhou Beef Noodle Standards and Lanzhou Beef Noodle Restaurant (Store) Grading local standards. The official "authentic" is to meet these two standards.

The standard stipulates the quality, variety, specifications, technical requirements and sensory requirements of noodles, and divides noodle restaurants into four grades according to their materials, management, technology, service, safety and hygiene and environmental protection.

On July 1 day, 2065438, the Interim Measures for the Administration of the Use of Beef Noodles Trademarks in Lanzhou City formulated by Lanzhou Commercial Federation came into effect. This means that all enterprises and individuals who meet the conditions for the use of the registered trademark of "Lanzhou Beef Noodles" can use the trademark for free.

The registered trademark of "Lanzhou Beef Noodles" can be used in two different ways according to different regions. That is to say, all catering enterprises or individuals that have operated or intend to operate Lanzhou beef noodles, as well as enterprises or individuals that produce and operate Lanzhou beef noodles related products within the administrative division of Lanzhou City, can apply for the trademark of Lanzhou beef noodles.

The general licensing method is adopted, and the chain enterprises are uniformly declared by the head office or company, with one store and one license. And outside the administrative division of Lanzhou, it is licensed by exclusive or competitive bidding.

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