What temperature is the black coffee? how much water is suitable for the black coffee? how much water is used to brew the coffee?

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Water temperature and water quality

The "ideal" water temperature for making coffee is about 195205 ℉ (91-96 ℃). This is slightly below the boiling point and is the point where the most flavored compounds are easily soluble in water.

The higher the temperature of the water, the faster the extraction. If the water is too cold, it will take longer to extract. To some extent, some compounds cannot be extracted at all. This is why cold coffee lasts longer and tastes more mellow than hot coffee.

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