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Discussions > Coffee > Q and A > Oily film left...  
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ChrisNY
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Joined: 26 Jul 2005
Posts: 3
Location: NYC
Expertise: I live coffee

Posted Tue Jul 26, 2005, 11:25am
Subject: Oily film left on top of coffee....
 

I have a problem, my typical morning starts with my cup of coffee, I add half & half, then cover it and go off to the car. If it has been sitting for about 10 minutes I notice an oily film develops on top of the coffee. I have cleaned (and re-cleaned) the coffee maker but still have the same problem - it is rather disgusting. Any solutions?
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expobar
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Joined: 25 Mar 2004
Posts: 3,003
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Posted Tue Jul 26, 2005, 11:38am
Subject: Re: Oily film left on top of coffee....
 

brew your coffee weaker.  there's nothing wrong with the oil - it's a lot of the flavor of the coffee - they're coffee oils :-)
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counting
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Joined: 8 May 2005
Posts: 823
Location: Baltimore, MD
Posted Tue Jul 26, 2005, 2:59pm
Subject: Re: Oily film left on top of coffee....
 

Half-and-half is about 12% fat. Might it be that? In other words, does the film form if you don't add milk, or add skim milk?
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CraigA
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CraigA
Joined: 19 Dec 2001
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Location: Rexdale, Toronto, Ontario, Canada.
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Espresso: PID/PressureMod 2001...
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Vac Pot: Bodum Santos manual, Yama 5...
Drip: Behmor BraZen, BUNN VPR-APS,...
Roaster: Refurb Behmor 1600, BBQ...
Posted Tue Jul 26, 2005, 6:57pm
Subject: Re: Oily film left on top of coffee....
 

counting Said:

Half-and-half is about 12% fat. Might it be that? In other words, does the film form if you don't add milk, or add skim milk?

Posted July 26, 2005 link

Really?, up here it's 10%.

CraigA: Pict0170.jpg
(Click for larger image)

 
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cannonfodder
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cannonfodder
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Vac Pot: Dont smoke pot or vac it.
Drip: Press pot
Roaster: Hottop, drum roaster
Posted Tue Jul 26, 2005, 8:44pm
Subject: Re: Oily film left on top of coffee....
 

Oil in your cup is a good thing, provided it is the oil extracted from freshly roasted and ground coffee from a clean machine. These are the essential oils from the beans. In espresso, they are emulsified under the brew pressure and form the crema. No oil means you are using old stale beans.

 
Dave Stephens
www.home-barista.com
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Dasein
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Posted Wed Jul 27, 2005, 10:00am
Subject: Re: Oily film left on top of coffee....
 

That's all coffee related goodness!  Enjoy.  But be carefull -- if you look at it too long you'll start seeing shapes and stuff.  Fluffy bunnies, clouds, faces... I once saw Mark Prince riding a tricycle floating around my cooffee oils.  Then there was that clown with a chainsaw cutting off chicken heads....
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counting
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Joined: 8 May 2005
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Location: Baltimore, MD
Posted Wed Jul 27, 2005, 6:37pm
Subject: Re: Oily film left on top of coffee....
 

When I was a kid, whole milk was about 4% fat, table cream or light cream was about 20%, so half-and-half was about 12%. But who knows? The way standards have slumped in the modern world, it could be anything today, maybe even 10%.

The percentage of fat in half-and-half is not labeled in the US. In Canada, are table cream and heavy cream labeled in the same way as the 10% stuff?
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CraigA
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CraigA
Joined: 19 Dec 2001
Posts: 11,208
Location: Rexdale, Toronto, Ontario, Canada.
Expertise: I live coffee

Espresso: PID/PressureMod 2001...
Grinder: BUNN FPG-2 DBC, Baratza...
Vac Pot: Bodum Santos manual, Yama 5...
Drip: Behmor BraZen, BUNN VPR-APS,...
Roaster: Refurb Behmor 1600, BBQ...
Posted Wed Jul 27, 2005, 6:55pm
Subject: Re: Oily film left on top of coffee....
 

counting Said:

The percentage of fat in half-and-half is not labeled in the US. In Canada, are table cream and heavy cream labeled in the same way as the 10% stuff?

Posted July 27, 2005 link

Yeah, my pic above...

 
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ChrisNY
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Joined: 26 Jul 2005
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Location: NYC
Expertise: I live coffee

Posted Thu Jul 28, 2005, 6:10am
Subject: Re: Oily film left on top of coffee....
 

Thanks for all the input, I enjoy strong coffee so I don't want to dilute it, and its better with half & half.  I will try to post a picture of it when it happens next - I don't want to take away any of the flavor (or the coffee related goodness) but I would like to get rid of the film...

Thanks again.
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cannonfodder
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cannonfodder
Joined: 14 Dec 2004
Posts: 873
Location: Dayton, Oh
Expertise: I live coffee

Espresso: ElektraA3,Faema2G, Isomac,...
Grinder: Cimbali, Mazzer
Vac Pot: Dont smoke pot or vac it.
Drip: Press pot
Roaster: Hottop, drum roaster
Posted Thu Jul 28, 2005, 1:49pm
Subject: Re: Oily film left on top of coffee....
 

ChrisNY Said:

Thanks for all the input, I enjoy strong coffee so I don't want to dilute it, and its better with half & half.  I will try to post a picture of it when it happens next - I don't want to take away any of the flavor (or the coffee related goodness) but I would like to get rid of the film...

Thanks again.

Posted July 28, 2005 link

Drink faster ;^)

 
Dave Stephens
www.home-barista.com
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