Espresso is a coffee brewing process that is produced by the process of brewing coffee under high pressure and temperature. Espresso is made by grinding coffee until it is finely ground, then tamping it, or “tamping,” and then brewing the coffee under high pressure and at high temperatures, resulting in a strong coffee extract, Espresso known as balance between sweet, acidity and bitterness, espresso using 1:2 brew ratio within 25 until 30 seconds and also about the ristretto is brewed the coffee on the shortest way, with 1:1 brew ratio within 20 to 23 seconds for more concentrate aromatics coffee extract.
Grind size means the size of your coffee grind, grind size is divided into 3 groups: Fine which means fine grind; Medium is a grind that is not too fine but not too coarse either; and Coarse is a type of grind that is quite coarse with a range.
The finer the grind size that is ground, the longer the extraction time created in the coffee machine. Because the flow of water that falls is increasingly held back by the coffee powder itself, so the longer the water phase touches the coffee which creates a more intense flavor.
Generally making coffee with espresso shots will use a fine grind, while coarse grinds are usually used in manual brew techniques or post-roasting cupping processes.