Italian fully automatic coffee extraction how many milliliters notice time

Italian fully automatic coffee extraction how many milliliters notice time

1. Too rough grinding: if the flow rate is too fast, more than 60 milliliters of coffee liquid may be extracted in less than 20 seconds; the concentrated color is light yellow, the texture is thin, and the maintenance time of oil is very short; the taste is high acidity, simple taste and heavy water feeling.

two。 Over-fine grinding: the flow rate is very slow, more than 30 seconds of extraction time, can not extract more than 50 ml of coffee liquid; the color is dark brown, thick; taste bitter, irritating. After the extraction, "a depression of water" is likely to appear on pressed powder, because the water can not pass smoothly through the powder layer and is silted on the surface of pressed powder.

[extraction time]

The extraction time of the Espresso gold rule is between 22 and 28 seconds, but the extraction time is actually a combination of packing pressure, powder content and grinding degree, which needs to be adjusted by the barista's understanding of Espresso.

[extraction amount]

Few people will change the amount of Espresso 30ml per serving and 60ml double, except for a few Italians who use a single serving of coffee powder to extract only 15ml of coffee liquid.

A good concentration of extraction cup requires stable pressure, suitable water temperature, suitable grinding degree, suitable powder content and so on. Then what is appropriate? For example: WBC stipulates that 1 serving of Espresso is 1oz (25~35ml, including Crema), boiled at a temperature of 90.5 to 96 degrees Celsius, brewing pressure 8.5bar~9.5bar, and extraction time of 20 to 30 seconds (no mandatory stipulation). In order to meet the above requirements, a good Italian coffee maker and bean grinder is essential. Often a lot of novice extraction is difficult to concentrate, because at the beginning do not understand, want to get started to play, the result bought a relatively poor so-called 15bar pressure Italian coffee machine and can not accurately adjust the scale of the bean grinder or only suitable for grinding coarse powder single product grinder. I would like to appeal to all novices, do not rush to buy espresso equipment, be sure to do your homework before starting, otherwise it is easy to spend money, but also can not make coffee.