Hello Michel,
somehow the purchase of a KVA is counteracted by the desire to pre-grind the coffee.
however then you will not be spared a harantesten.
The 25 seconds contact time from water to coffee powder is important to tickle out an optimal taste/aroma. Anyway, that was my experience.
If the water runs through faster than 25 sec, grind finer. If the flow time is longer, grind coarser.
You have to find out for yourself your individual favorite strength from the amount of ground coffee.
Temperature (under my coffee) to high.
Amount of water 30ml, less is unfortunately not possible.
The espresso likes it a bit finer ground.
prewarm cup you surely know.
My experience is that these settings (grind)unfortunately can not be transferred 1 to 1 to a good coffee cream. He likes it a bit coarser to get an aromatic coffee with the same bean. There should be 120 ml in about 25 sec through.
I hope I have not written any tricks now.
Have fun trying it out.
PS: distinct acid note indicates too coarse grinding.
Less aroma, burnt feeling, bitter note (tongue sides), very light crema indicates too fine grinding!
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