How do you mix espresso in wet weather? How to make espresso parameters to taste good?

Guangzhou has entered the wet back to the south, the walls of water droplets, the floor that will never dry, and the clothes that are drying more and more. Of course, there are coffee beans that are most afraid of moisture.

How does going back to the south affect the production of Italian coffee? The resident barista at the bar should have a deep understanding of this. In the dry weather with small daily temperature difference, the extracted espresso coffee is relatively stable. The parameters adjusted in the morning will not deviate greatly in one day. When it rains or returns to the south, the deviation of extraction is a bit large. This is because when the ambient humidity is high, the coffee beans in the bean warehouse are easy to get wet, and when grinding, they are also easily disturbed by water vapor, causing coffee powder to agglomerate and taste. When extracting espresso coffee, it is very easy to have extraction instability.

Another point that will also have a slight impact on the extraction is that when the humidity is higher, the lower the air pressure, the espresso machine will be slightly lower than usual when pressurized extraction. Then the extracted coffee flavor will be lighter than the taste. Therefore, it is necessary to find a stable adjustment method to ensure the stability of the product. So how do you deal with bad weather like back to the south? Number one, minimize moisture in coffee beans Close windows and doors to minimize outdoor moisture intrusion. If conditions permit, dehumidifiers can be used to maintain indoor humidity. Because the humidity at night is greater than during the day, so at the end of the day after the end of business to put the beans grinder bean bin coffee beans back into the sealed bag (bin) storage. The bean bin needs to be wiped, because if the moisture mixes with the residual oil of the coffee beans, it is very easy to produce a foul smell. The grinding disc and the residual powder in the powder receiving channel should also be cleaned up as much as possible.

The second point is to solve the problem of caking coffee powder. If it is on weekdays, the freshly ground coffee powder rarely has caking problems (the problem of the grinder itself is said separately), and the state of extracting coffee with powder is still very stable. When encountering serious agglomeration phenomenon, the powder distributor can not achieve the real effect of "evenly distributing coffee powder". The agglomerated part is still denser than the other parts, and the extraction state is naturally unstable.

Therefore, the easiest way to solve this kind of situation is to use hand powder to break up the caked coffee powder. If there are economic conditions, you can get a needle powder distributor, and you can also get a uniform distribution effect. Third, how to adjust the stable extraction parameters Due to the problem of low pressure and high humidity, according to the daily grinding degree extraction, water penetration will be slower, and the extraction time will be longer than before. Qianjie suggested that the most stable way is to increase the powder amount and adjust the coarse grinding degree.

Coarsening can slow down the degree of caking of coffee, but also control the operation of time, while adding powder is for more stable extraction. An example is given below for everyone to understand. The extraction parameter of Qianjie on weekdays is 19.5g to extract 35g coffee solution for 30 seconds (including 6 seconds pre-soaking). When the humidity is relatively high, the powder amount can be increased to 20g first, or 35g coffee solution as a result, and the extraction time can be controlled at 30 seconds by adjusting the grinding degree. And then decide whether to fine-tune it based on the specific flavor feedback.

Especially when the weather conditions change greatly back to the south, it is not possible to stabilize the whole day by adjusting it once in the morning. It is necessary to adjust it in real time according to the actual extraction conditions. Here to give you a reference, extraction time difference of more than 3 seconds, it should be adjusted grinding.