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andys
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andys
Joined: 10 May 2003
Posts: 851
Location: NY
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Espresso: Speedster, Londinium 1
Grinder: EK-43,Robur, HG One, M3
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Roaster: PIDed Popper
Posted Mon Mar 12, 2012, 6:53pm
Subject: Re: coffee refractometer
 

TonyVan Said:

Andy, when you DO develop a PPDD (hey - will there be a special package deal when purchased with a Schnozzola?)

Posted March 12, 2012 link

Yes, when you buy the $800 PPDD, Schnozzola is included free of charge.

And now back to our regularly scheduled programming.... 8-)

 
-AndyS
picture page:  http://flickr.com/photos/andy_s/sets/
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Netphilosopher
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Joined: 14 Jan 2011
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Posted Tue Mar 13, 2012, 5:11am
Subject: Re: coffee refractometer
 

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mitch236
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Joined: 7 Nov 2003
Posts: 64
Location: Delray Beach
Expertise: I love coffee

Espresso: Linea Single Group (PID,...
Grinder: Mazzer Robur E
Posted Tue Mar 13, 2012, 7:44am
Subject: Re: coffee refractometer
 

andys Said:

I recently heard a story that is relevant. Bear in mind that I got the story 2nd or 3rd hand, but I have no reason to suspect it's untrue.

A certain former Barista World Champion, known for his excellent coffee roasting, was visiting another former Barista World Champion. The municipal water at the first guy's location is known to be very low in TDS, whereas the second guy's is relatively average. When the first guy tasted his own espresso blend at the second guy's shop, he was shocked, saying, "I've never had my own blend tasting so good!" They looked at a bunch of factors (grinder, espresso machine, etc) but concluded that the water was the reason.

Posted March 10, 2012 link

I'm sure the water plays a large part.  I will try the Cirqua packets (funny, I saw them but didn't realize I could do the experiment so easily with them!).  I am using VST baskets with a Pullman tamper.   I'm really hoping it turns out to be my machine since I'm getting a new machine in a few weeks!  That would be the easiest solution!
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GlennV
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Location: UK
Expertise: I love coffee

Posted Tue Mar 13, 2012, 8:02am
Subject: Re: coffee refractometer
 

Netphilosopher Said:

If so, please post your hypothesis as to changes, direction of change and what you think might be happening.

Posted March 13, 2012 link

Well, I'd expect it to go down because of precipitation, by crystallization - this is what happens to the reference sugar solution I made up anyway. If you don't get back to the same number after warming up and shaking your syringes, then I would be surprised.
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mitch236
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Location: Delray Beach
Expertise: I love coffee

Espresso: Linea Single Group (PID,...
Grinder: Mazzer Robur E
Posted Tue Mar 13, 2012, 8:17am
Subject: Re: coffee refractometer
 

This morning as I was playing with the refractometer, I was wondering why one couldn't just drop the filtered solution right from the syringe?  Why do we have to filter the coffee into another vessel then transfer the filtered solution with a pipette?
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andys
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andys
Joined: 10 May 2003
Posts: 851
Location: NY
Expertise: Just starting

Espresso: Speedster, Londinium 1
Grinder: EK-43,Robur, HG One, M3
Vac Pot: Yama
Drip: various
Roaster: PIDed Popper
Posted Tue Mar 13, 2012, 4:29pm
Subject: Re: coffee refractometer
 

Netphilosopher Said:

do you have any recipes for brewed coffee that will result in TRULY overextracted coffee.

Posted March 11, 2012 link

These long range diagnoses are very difficult, but OK, I'll take another stab at it.

What grinder are you using? Grinders make a big difference in extraction yield and extraction evenness. Your various comments (such as difficulty in getting normal extractions, crappy flavor at 19% yield, and lots of fines to deal with) all are consistent with bad grinding.

Bad grinding includes worn burrs in good grinders, good burrs in poorly aligned grinders, good burrs incorrectly mounted, good grinders with bent shafts, and every other unfortunate situation you can think of. So what grinder(s) are you using and when were the burrs changed?

 
-AndyS
picture page:  http://flickr.com/photos/andy_s/sets/
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Netphilosopher
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Joined: 14 Jan 2011
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Location: USA
Expertise: Just starting

Posted Wed Mar 14, 2012, 5:52am
Subject: Re: coffee refractometer
 

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Netphilosopher
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Joined: 14 Jan 2011
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Location: USA
Expertise: Just starting

Posted Wed Mar 14, 2012, 5:53am
Subject: Re: coffee refractometer
 

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kieranjol
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Joined: 3 Feb 2012
Posts: 17
Location: Ireland
Expertise: I love coffee

Grinder: Baratza Maestro Plua /...
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Posted Wed Mar 14, 2012, 9:34am
Subject: Re: coffee refractometer
 

andys Said:

I recently heard a story that is relevant. Bear in mind that I got the story 2nd or 3rd hand, but I have no reason to suspect it's untrue.

A certain former Barista World Champion, known for his excellent coffee roasting, was visiting another former Barista World Champion. The municipal water at the first guy's location is known to be very low in TDS, whereas the second guy's is relatively average. When the first guy tasted his own espresso blend at the second guy's shop, he was shocked, saying, "I've never had my own blend tasting so good!" They looked at a bunch of factors (grinder, espresso machine, etc) but concluded that the water was the reason.

Posted March 10, 2012 link

http://www.jimseven.com/2012/02/05/scandinavian-travels/

"The impact of water on the coffees blows my mind.  Worrying about water isn’t new – brewing coffee with London water pretty much obliterates any interesting or unique flavour characteristics in a coffee.  In Copenhagen we were cupping with reverse osmosis treated water (we have similar systems) and in Oslo the water is very soft, and just taste/odour filtered.1

Technically both times the water was within spec – not too hard, not too much TDS.  The coffees in Copenhagen were suddenly flat, though we later cupped one at different water TDS quantities and got better results from a slightly higher TDS than the Collective would usually use.  This higher TDS would turn out to negatively affect their coffees.  In Oslo one coffee noticeably improved (I had worried it was bordering on a touch light in London), others were good and one tasted  much worse.  I know water effects coffee taste – it was just shocking to be reminded how much of a difference small changes make."
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Netphilosopher
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Joined: 14 Jan 2011
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Location: USA
Expertise: Just starting

Posted Thu Mar 15, 2012, 5:11am
Subject: Re: coffee refractometer
 

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