Focusing on draft beer foam stability, the paper puts much attention to the deciding factors, decline principle and control technology.

重点研究了纯生啤酒泡沫稳定性的影响因素、衰减规律及控制技术。

Common flaws such as weak foam stability and increasing decline with shelf life are found in draft beer on present market.

目前，市售的纯生啤酒在泡沫稳定性方面普遍存在明显的缺陷，即泡沫稳定性差，并随着货架时间的延长而逐渐下降。