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Adjusting Grind/Temp
Rocket R58 Double Boiler
Rocket Espresso R58 Double Boiler -  Everything you need for the perfect shot!
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UGEN
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Joined: 7 Aug 2013
Posts: 22
Location: Aus
Expertise: I live coffee

Posted Sat Sep 28, 2013, 2:11am
Subject: Adjusting Grind/Temp
 

Hey I've had a lot of good advice from here and I'm finally starting to get brews which I'm happy with! I have been reading up about adjusting the grind size as the coffee ages/is more fresh and I'm a little puzzled how this works.

Will the beans grind on call it "setting 1" to the same particle size as they age as when they are fresh or will as they get older the grind on the "setting 1" gets finer or coarser? And how does this effect extraction. If the particle size gets finer on "setting 1" as they age do I need to adjust my grind a few notches coarser to say "setting 3" to get the same particle size/extraction? Or do I keep the beans on "setting 1" as when they age and become finer they also become more stale and require a finer grind to get the same flavor/extraction?

I'm confused as I'm trying to be consistent with my brews but using the same bag of coffee over a week the results may change day to day which then it's hard for me to see where I'm going wrong!'
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squaremile
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Joined: 6 Jan 2011
Posts: 83
Location: Portlandia
Expertise: Just starting

Posted Sat Sep 28, 2013, 8:20am
Subject: Re: Adjusting Grind/Temp
 

It doesnt have to do with particle size change, but how the coffee interacts with the water due to oxidation. If you are storing beans properly you shouldnt notice too much difference over a week, but if you could toward the end of the second week. A lot of people will then adjust the grind a small bit finer.
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UGEN
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Joined: 7 Aug 2013
Posts: 22
Location: Aus
Expertise: I live coffee

Posted Sat Sep 28, 2013, 7:57pm
Subject: Re: Adjusting Grind/Temp
 

But will the beans grind differently fresh as they will when they age eg to the same size. I have read that as the beans age they get finer and finer if you use the same setting so do you need to adjust it a little coarser on the settings to keep particle size the same?
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squaremile
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Joined: 6 Jan 2011
Posts: 83
Location: Portlandia
Expertise: Just starting

Posted Sat Sep 28, 2013, 10:12pm
Subject: Re: Adjusting Grind/Temp
 

I have not read that anywhere before your post. Regardless of particle size, you are still aiming for ideal strength and extraction for each cup. If you ground fresh coffee on say '20' on your grinder and got a perfect cup, then two weeks later to get the same levels you would have to grind maybe a '19'. If you bumped it to '21' instead you would underextract for sure. Maybe there is some interaction with the beans grinding differently with age, and to keep the size the same you would need to grind coarser. However, the cups would not be good.
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NobbyR
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NobbyR
Joined: 10 Jul 2011
Posts: 2,039
Location: Germany
Expertise: I love coffee

Espresso: Poccino Opus One, Ariete
Grinder: Eureka Mignon Istantaneo
Vac Pot: N/A
Drip: Melitta Linea Unica de Luxe
Roaster: N/A
Posted Sun Sep 29, 2013, 1:18am
Subject: Re: Adjusting Grind/Temp
 

A number of factors influence the required fineness of grounds for optimal extraction, aging is just one of them. Humidity, for example, can even affect the ideal grinder setting within a single day. Also the single shot basket usually needs a different grinding than the double shot basket. A different variety, blend or batch of beans or a different roast might need some dialing in as well.

As you can see, there's no permanent setting for your grinder, only a temporary one.

Also particle size varies within a certain range even in seemingly homogenous grounds. For espresso a single coffee bean is broken into about 3,500 particles. The graph shows the size distribution for drip coffee, but it looks similar for espresso with its peak at around 200 Ám.

NobbyR: Partikelverteilung.JPG
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"This drink of the Satan is so delicious that it would be a shame to leave it to the infidels." (Pope Clement VIII on coffee, when he was urged to ban the beverage)
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UGEN
Senior Member


Joined: 7 Aug 2013
Posts: 22
Location: Aus
Expertise: I live coffee

Posted Sun Sep 29, 2013, 5:01am
Subject: Re: Adjusting Grind/Temp
 

Thanks for your replies! I will see how I go with the current bag I'm on now! :)
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emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 3,029
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4 x2, VDD...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Sun Sep 29, 2013, 7:45am
Subject: Re: Adjusting Grind/Temp
 

maybe I missed it, but I couldn't tell if you are making espresso or other preps and what grinder you have.  Espresso grinders produce a bimodal distribution of grounds, ie, there are two different average particle sizes produced at the same time, so the grounds in the basket is a mix of the two...fyi

 
.
Always remember the most important thing is what ends up in your cup!
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UGEN
Senior Member


Joined: 7 Aug 2013
Posts: 22
Location: Aus
Expertise: I live coffee

Posted Sun Sep 29, 2013, 3:40pm
Subject: Re: Adjusting Grind/Temp
 

Sorry I should have made that clearer! I'm brewing with a v60/Aeropress and have a Baratza Preciso which I also sift the grounds to remove fines!
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