I read some instructions somewhere that suggested that when making coffee on a domestic machine you turn on the brew switch for 3 seconds, wait a further 5 seconds, and then turn it on again and brew your shot. Apparently this is the equivalent of commercial machine preinfusion.
Do people do this? Are they aware of this technique? Can anyone shed any further light on commercial machine preinfusion?
Do people do this? Are they aware of this technique? Can anyone shed any further light on commercial machine preinfusion?



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