Effect of Coffee extraction temperature on extraction what is the performance of insufficient extraction and excessive extraction

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Two problems of insufficient extraction and excessive extraction: insufficient extraction, that is, the flavor of coffee is not fully extracted by water, at this time, if it is espresso, the color will be lighter and sour.

If you get rid of the phenomenon of rough deficiency, the taste will often be sour.

Coffee is excessively extracted, that is, the flavor of coffee is excessively extracted by water, which is mixed, bitter and even scorched.

If the extraction is excessive, the taste will often be more bitter. The higher the temperature of the water, the more flavor will be extracted. Therefore, too high temperature may cause excessive extraction, on the contrary, if the temperature is too low and the flavor uptake is not enough, it will lead to insufficient extraction.

The fresher the coffee, the more flavor it will contain. The longer the coffee is kept, the less flavor it will contain.

The conclusion is that the fresher the coffee is, the lower the temperature is because you don't want to extract the excessive flavor. The less fresh the coffee is, the higher the temperature will be, because a higher temperature is needed to increase the solubility of the water to absorb the retained flavor.

For example, espresso often takes about a week to wake up, and the coffee extraction temperature is often about 92 °a week later. If it has been placed for more than 3 months, it will often be 96 °.

Hand-made coffee is often ready to drink on the third day, so very fresh shallow roasted coffee (light roasting is often low temperature, later) some people even use about 70 °for extraction, so the biggest significance here is not. How much temperature is the most appropriate. Because this is not a ready answer. But after understanding the nature of the extraction, the appropriate temperature should actually be relatively speaking, that is, relative to coffee beans, but also relative to the taste. To master the rules well, it is most important to try by yourself.