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Under-extracted Espresso Coffee
Cause
  • Dose less than 7 g
  • Temperature of water < 88°
  • Pump pressure < 9 atmospheres
  • Coarse ground
  • Lightly pressed
  • Extraction time < 20 secs



Check to be carried out
  • Check grinding and grinding blades’ wear
  • The ground coffee portion may range between 7.5 gr and 8.5 g
  • Is the batcher clean?
  • Is water temperature between 90-95°C ?
  • Is the supply between groups uniform?
  • Is pump pressure at 9 atmospheres?
  • Are the diffusers clean?
  • Are the filters clean?
  • Are the filter-holders clean?

Clear hazel-cream colour, thin and evanescent.

Not very consistent
Large bubbles present
No body
Little aroma
Weak taste
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