HomeRoast Digest


Topic: Love those experiments (3 msgs / 62 lines)
1) From: The Scarlet Wombat
Tried more non-tamping this morning.  I have some delicious Zimbabwe 
roasted to just shy of second crack and ground it pretty fine, filled the 
filter basket and drew a double for an Americano with no tamping.
The shot took 30 seconds, think I need to back off just a wee bit on the 
grind, but there was a wonderful smoky flavor int he coffee that is not 
present if you grind it more coarsely, or not to this extent.
I cannot tamp at this level of grind, any tamping at all clogs the sl90, 
but with no tamp, this is wonderful.  Now, to go back and forth between 
grinds and tamp versus no-tamp and see just wha the subjective differences are.
One thing I can tell you, the 30 second double shot had more crema than any 
espresso I have ever pulled.
So many different things to do, so few lifetimes...
Dan
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2) From: Dan Bollinger
It sounds like the finer grind is responsible for the additional flavor and
crema.  Do you think so, too?  You mention not being able to tamp fine
grinds.  Is this a pressure limitation?  What pressure does the sl90
develop?  Dan
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3) From: The Scarlet Wombat
Dan, the sl90 supposedly develops 9 to 10 atmospheres, but there is no way 
to measure it exactly, I suspect.
I get about the same result with a slightly coarser grind and tamping as I 
do with a finer grind and no tamping, the machine labors the same amount 
and I can hear the coffee dripping out and can tell the crema content by 
the sound of it hitting the surface of the liquid in the cup.  One develops 
many accomodations for a missing sense.
None of this will ever be scientific, and I have no intentions of giving up 
tamping, but it is interesting to see that a slightly finer grind will 
bring out such flavor and crema without tamping.  I am happy my grinder is 
continuously variable, this might not be possible with click stops.
I think, like you, I need a roaster that will do a pound at a time as this 
experimentation could take many years and use up many pounds of coffee.
Dan
Make coffee, not war
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