What causes latte flowers to appear zigzag? The pattern is not clear solution

A friend called for help in front of the street. "Why is it difficult to push the pattern of the flower recently, and the pattern has obvious zigzag patterns?"

It is believed that every barista who has pulled flowers will experience the problem of "zigzag" in this pattern. Many baristas are at a loss when faced with this situation and will blame their poor condition, and after a period of time, the jagged pattern will disappear.

There are many reasons for the zigzag pattern, but most of what happens is that the coffee beans are too fresh. Italian coffee beans are too fresh, there will be a lot of rich gas in the coffee beans, when the coffee beans are too fresh to extract coffee, the rich carbon dioxide will be pressed into the oil, so the fresh coffee bean oil will be more abundant, but this oil is very rough, poor fluidity. In the production of flowers, this layer of rough and thick grease is difficult to blend evenly, resulting in poor fluidity and the feeling that it can not be pushed away, coupled with the fact that the rough grease does not blend with milk to produce sawtooth patterns. So there is nothing wrong with the pattern from a distance, but the dense sawtooth pattern looks very ugly up close.

The freshness of coffee beans will not only affect flower drawing, but also affect the performance of flavor. Beans contain too much carbon dioxide, which will inhibit the release of coffee substances, and the extracted espresso liquid does not have much flavor and will be bitter (or tart). The easiest way to solve this problem is to let the coffee beans stand still for a period of time, that is, the bean cultivation period. The Italian coffee beans commonly used in the front street will be kept for about 10 days. However, Qianjie also comes into contact with some espresso beans that take longer to grow, up to 15-20 days, depending on the espresso beans. It is for this reason that some friends are at a loss when they encounter sawtooth lines, even if they do nothing, the phenomenon of "zigzag lines" does not happen after a period of time.

Of course, in addition to this problem, there are other reasons that will also lead to "zigzag lines", mainly because milk foam and oil are not fully integrated evenly. The more common problem is that the milk foam is too thin, resulting in not enough milk foam and oil fusion, when pulling flowers, it is easy to appear the phenomenon of erratic shape and jagged pattern. In addition, the milk temperature is too high also easy to make the pattern zigzag phenomenon. In front of the street, it is recommended that the milk be served at a temperature between 55 and 65 degrees Celsius.