Matters needing attention in the extraction of espresso? Coffee extraction
1. Matters needing attention in the use of spherical liquid separation funnel:
1) before use, the glass piston should be coated with a thin layer of Vaseline, but not most of it, so as not to block the flow hole. When in use, the left hand tiger mouth resists the funnel ball and rotates the piston with the thumb and index finger to control the filling of liquid. At this time, the small groove of the glass piston should be aligned with the small hole on the side of the funnel mouth before the liquid filling can be carried out smoothly.
2) when used as a liquid feeder, the lower end of the funnel can not be immersed under the liquid level.
2. Matters needing attention in the use of pear-shaped liquid separation funnel:
① checks whether the liquid separation funnel is leaking.
The ② mixed liquid is poured into the liquid separation funnel, and the liquid separation funnel is placed on the iron ring.
③ opens the piston of the liquid separation funnel, and then opens the cock so that the lower liquid (water) is released from the lower end of the liquid separation funnel. The cock can be closed when the oil-water interface is tangent to the upper mouth of the cock.
④ pours the upper liquid (oil) from the top mouth of the separator funnel.
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What is coffee extraction? What on earth is a cup of coffee?
When thinking about it, I find that I still want to explain a concept first, which is very important and has a vital impact on a cup of coffee. Let's start with a question: what on earth is a cup of coffee? To put it simply, when the water passes through the coffee powder, it dissolves and brings out some of the soluble matter in the coffee powder, and then we get a cup of coffee. That is to say
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The way of coffee extraction the way of coffee extraction and its taste
According to the contact mode of water and coffee powder, coffee cooking can be classified into five categories: steaming, pressurization, gravity, leaching and ice brewing. The easiest way to cook is to put the coffee powder in the cup and add hot water. As it cools, the coffee powder will sink to the bottom of the cup. This is an old method, and it is still used in some parts of Indonesia. Be careful not to get to the bottom of the cup
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