The basic knowledge of buying Coffee beans

The judgment at the time of pawn

The easiest way to make delicious coffee is to sigh the filter paper. When brewing, there is also a way to judge whether the coffee is delicious, that is, when it is in hot water, the powder is not inflated, and when the coffee is fully roasted and extracted water, there will be beautiful and meticulous foam puffing up.

Judgment after pawn

Although the concentration of coffee will change due to different roasting degree and extraction method, the characteristic of delicious coffee is that the coffee liquid extracted by the pawn is clear under the same conditions. The spoon can be clearly seen through the stroke fluid in the picture below, while the one in the stone picture is almost invisible. It is difficult to tell whether a cup of coffee is delicious, but if you compare it, you can see whether the coffee is delicious or not. even after 30 minutes, the color of a delicious cup of coffee is still clear and the taste will not change.

Judging from the taste and aroma of coffee

The sour taste of delicious coffee is as refreshing as citrus fruit, without strong sour taste. Bitterness is a soft bitterness. There is no bitterness like cigarette or scorch.

Judging from the quality of raw beans

The shape, grinding stage, stroke, post-stroke, taste and flavor stages have been discussed before, as the focus of judging whether the coffee is delicious or not, but these are all for completely roasted coffee beans. Raw beans are green before roasting, commonly known as [Green]. If the quality of raw beans is poor, no matter how hard you cook them, you will not be able to brew beautiful coffee. Raw beans are usually exported from the place of origin two months after harvest, and this year's crop is called New Crop. After a year, it's called Past Crop. After a longer period of time, it is called Old Crop. Coffee beans are crops, and their freshness will naturally affect their taste. Fresh raw beans can enjoy the distinct characteristics and vibrant flavor of each variety. Take rice as an example, if it is placed for a long time, its original flavor will be diluted with the loss of water. Fresh raw beans, showing a bright green color, can be easily distinguished. Except for freshness. No matter what kind of variety, we should also try to choose raw beans with large particles and no color spots.