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d33pbluez
Senior Member


Joined: 19 Nov 2013
Posts: 32
Location: Malaysia
Expertise: Just starting

Posted Sun Dec 15, 2013, 10:20pm
Subject: Coffee Post bubble
 

Hi,

Recently i notice that the coffee i brew had alot of large bubble start pop out (Look like acid etching the metal) after the milk was introduce into the coffee. when i put my ear near the coffee i can hear hissing sound (Like carbonated drink gas sound).

Does this means my beans (Sumatra) had a problem as previously i didn't encounter this problem before with other beans (Brazil)
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,853
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Dec 16, 2013, 9:18am
Subject: Re: Coffee Post bubble
 

IT is hard to say what the problem is.
Perhaps you heard the air in the milk leaving the mix. While the gasses can through off the taste of coffee, I have not seen too fresh of a roast for brewing have excessive gas IN the coffee. The bloom will be excessively large in normal brewing but in espresso,  I can't see issues with trapped gas in the coffee.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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d33pbluez
Senior Member


Joined: 19 Nov 2013
Posts: 32
Location: Malaysia
Expertise: Just starting

Posted Mon Dec 16, 2013, 5:49pm
Subject: Coffee Post bubble
 

Hi calblacksmith,

Air leaving the milk, Hmm .... Not that i seen before after more then 50 cups of brew.....It is strange too as it only happen to the first cup i brew....Second cup was OK.... Speaking of freshness, there seem to be possible because i brought the bean that was roasted on the first day then i immediately put into my seal jar...
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CoffeeLoversMag
Senior Member
CoffeeLoversMag
Joined: 10 Jan 2013
Posts: 218
Location: Seattle
Expertise: I love coffee

Posted Thu Dec 19, 2013, 8:41am
Subject: Re: Coffee Post bubble
 

If you did not encounter this problem with other beans before, we suspected that the new beans you use are the culprit of the reaction. However, the beans are not really the cause of the large bubbles that pop out. There is something causing that bubbles and the milk might be pointed as the problem. Just try to change the milk to be added into the coffee.

 
Did you know...? Dark roast coffees actually have less caffeine than lighter roasts due to the fact that the process of roasting burns off caffeine.
www.coffeeloversmag.com/theMagazine
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