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Help with oily beans
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Plaquemine
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Joined: 8 Jul 2013
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Location: New Iberia, LA
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Posted Tue Aug 20, 2013, 6:29am
Subject: Help with oily beans
 

I've been home roasting for about 4 months. I'm using the Nesco Pro. I stop my roast immediately after the 2nd crack which gives me my desired roast. I let the beans set for 72 hours. In this settling period the beans progressively turn from a good roasted dry bean to an oily bean. The beans start getting oily after about 24-36 hours. I store the beans in an air sealed glass container in a dark area. I've tried a stainless steel air sealed container with a clear glass lid, but get the same results. I don't use the Nesco 5 minute cool down. I've tried transferring the beans to a SS colander and putting them in the freezer - same results, oily beans. I've also have transferred the beans to SS colander and cooled down with a fan transferring from colander to colander - same results, oily beans. Thanks for any suggestions
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calblacksmith
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Posted Tue Aug 20, 2013, 6:39am
Subject: Re: Help with oily beans
 

Mod note, moved to home roasting talk.

 
In real life, my name is
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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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WyoRoaster
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Posted Wed Aug 21, 2013, 6:12am
Subject: Re: Help with oily beans
 

Plaquemine Said:

I've been home roasting for about 4 months. I'm using the Nesco Pro. I stop my roast immediately after the 2nd crack which gives me my desired roast.

Posted August 20, 2013 link


Is that at the beginning or the end of second crack?

Plaquemine Said:

I let the beans set for 72 hours. In this settling period the beans progressively turn from a good roasted dry bean to an oily bean. The beans start getting oily after about 24-36 hours. I store the beans in an air sealed glass container in a dark area. I've tried a stainless steel air sealed container with a clear glass lid, but get the same results. I don't use the Nesco 5 minute cool down. I've tried transferring the beans to a SS colander and putting them in the freezer - same results, oily beans. I've also have transferred the beans to SS colander and cooled down with a fan transferring from colander to colander - same results, oily beans. Thanks for any suggestions

Posted August 20, 2013 link


I think the oiliness is inevitable for the amount of roast that you are giving the beans.  I don't think you can change that by any storage method.  If you don't want oily beans, stop the roast sooner.

Ed
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RichardCoffee
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Posted Wed Aug 21, 2013, 6:27am
Subject: Re: Help with oily beans
 

How long is your roast?  How many minutes between end of 1st crack and beginning of 2nd?
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Plaquemine
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Posted Wed Aug 21, 2013, 6:36am
Subject: Re: Help with oily beans
 

I stop the roast immediately after the 2nd crack. Thanks for the reply. I will try your suggestion
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Plaquemine
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Location: New Iberia, LA
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Posted Wed Aug 21, 2013, 6:56am
Subject: Re: Help with oily beans
 

My first roast is 20 minutes. If I have a 2nd or 3rd roast the time is less because the Nesco is hotter and takes less time to reach peak temperature. One of the disadvantages of the Nesco is it does not have a temperature gauge or controller.

First crack is usually around 12 minutes on the first roast. 2nd crack is over 7.5 to 8 minutes later.

Times change dramatically if I have a 2nd or 3rd roast which I often do because of the amount of espresso we drink (guests just happen to pop in since we have been home roasting)

I have been consistent in stopping the roast after the 2nd crack.

When I started roasting I assumed in order to get a good espresso roast I had to achieve a dark roast, but I'm finding out the best tastes have come from the lighter roasts. This is definitely trial and error for me due to my lack of experience so I appreciate any advice I can get.
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oldgearhead
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Posted Wed Aug 21, 2013, 11:53am
Subject: Re: Help with oily beans
 

Do you dump the beans into a 'real' cooler right after you stop the roast?
I never could hear second or even first crack in a Z&D or Nesco.

oldgearhead: Roaster_StationCombo2.jpg
(Click for larger image)
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Plaquemine
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Joined: 8 Jul 2013
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Location: New Iberia, LA
Expertise: Just starting

Posted Wed Aug 21, 2013, 12:04pm
Subject: Re: Help with oily beans
 

When I first started roasting, I would put them in a SS colander and put them in the freezer for about 20 minutes. The beans would come out of the freezer with a little moisture on them. I no longer use that method. I put them in a SS colander and put them in front of a fan to cool rotating them from one colander to another. I feel like the beans are not continuing to roast.
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oldgearhead
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oldgearhead
Joined: 25 Jan 2010
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Location: Go Colts!
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Roaster: 1/2K Fluid-bed
Posted Wed Aug 21, 2013, 12:19pm
Subject: Re: Help with oily beans
 

It's normal for convection roasted coffee beans to leach out the oil after a couple of days. I recall Micheal Sivetz described it as a  'feature' of his fluid-bed roasters.
I would just try 18 minutes and see if you like that better.
1) The Nesco, like all small household appliances, is a slave to your line voltage. Roast when your AC isn't running.
2) The roast can be slowed in two ways; a larger load of beans or a shorter time in the roaster.

More Nesco info here:
Click Here (www.sweetmariascoffee.com)
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RichardCoffee
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Joined: 2 Dec 2010
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Location: Long Beach
Expertise: I live coffee

Espresso: gaggia baby twin, mini...
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Roaster: weber grill with rk drum
Posted Wed Aug 21, 2013, 1:01pm
Subject: Re: Help with oily beans
 

I agree with the 18 minute roast idea. Give it a try. In fact, try 4 minutes post start of 1st crack.
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