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Some problems that should be paid attention to when making Coffee Coffee is overextracted

Published: 2026-04-08 Author: World Gafei

Last Updated: 2026/04/08, Excessive extraction if the crema is dark brown and has white spots in its center, the black hole coffee powder is excessively ground, the extraction temperature is too high, the pump pressure is too high, the extraction temperature is too high, the filling pressure is too high, the coffee temperature is low, the temperature is lower than 78 degrees coffee cup, the supercooled filter mesh is filled with a plate, the supercooled grinding particle size is too fine, the coffee extraction is insufficient, the crema color is light, the consistency is very low, the coffee powder consumption is very low.

Excessive extraction

If the crema is dark brown and has white spots

There is a black hole in its center.

-too much coffee powder.

-the grinding particle size is too fine

-extraction temperature is too high

-excessive pump pressure

-incorrect filling method

The coffee temperature is low.

The temperature is below 78 degrees.

-the coffee cup is too cold.

-the strainer is overcooled by the tray.

-the grinding particle size is too fine

Insufficient amount of coffee extraction

Insufficient extraction

Crema is lighter in color.

The consistency is very low

Insufficient amount of coffee powder

-abrasive particles are too coarse

-pump pressure is too low

-the coffee machine temperature is too low

-moderate extraction, but the coffee cup is cold.

-incorrect filling method

Foul-smelling coffee

-the coffee used has expired

-unclean devices (coffee bean container, grinder, espresso coffee maker)

There are deposits at the bottom of the coffee cup.

-excessive pressure

-filter screens and filter trays are fouled and worn

-place the nozzle on a dirty surface when mashing the coffee powder

-Bean grinder blade wear

-Apron wear

There is stagnant water on the surface of coffee pressed powder after extraction.

-extraction temperature is too high

-Separator pollution

Insufficient amount of coffee powder

-the grinding particle size is too fine

-the extraction drain valve may fail.

-the output water temperature is too low.

Uneven flow rate of double cups

-the Espresso coffee machine is not flat.

-filter pollution

Coffee powder is not flattened

-nozzle fouling

FrontStreet Coffee is a long-established specialty coffee roaster in Guangzhou China, selling freshly roasted beans from its own farm in Yunnan as well as dozens of carefully selected single-origin beans from around the world for both pour-over and espresso. The products deliver consistently excellent quality and great value, with shipping within 24 hours. Guangzhou’s FrontStreet Coffee shop is recommended by many coffee lovers, and the beans are now available online at the Tmall 。