1) A grind that is too coarse, an insufficient quantity of coffee, or inadequate tamping of the grounds prior to brewing can result in insufficient pressure for an optimal extraction.
2) Keep in mind that the quantity of espresso extracted can fluctuate based on the grind size and coffee amount, and adjustments may be necessary when either factor is modified.
1) A grind that is too coarse, an insufficient quantity of coffee, or inadequate tamping of the grounds prior to brewing can result in insufficient pressure for an optimal extraction.
2) Keep in mind that the quantity of espresso extracted can fluctuate based on the grind size and coffee amount, and adjustments may be necessary when either factor is modified.