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Static electricity and post-roast resting
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rsnidjik
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rsnidjik
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Posted Fri Mar 15, 2013, 7:07am
Subject: Static electricity and post-roast resting
 

My grinder's plastic coffee receptacle (where the coffee goes after grinding) has wonderful anti-static qualities. The ground coffee slides out of the container with little or no adherence to the plastic sides of the receptacle, regardless of weather conditions.

This morning, though, I ground my first batch of self-roasted beans (used a West Bend Poppery, stopped 30 seconds after start of 2nd crack). When I tried to pour the ground coffee from the grinder receptacle, about 20 percent of it stuck to the plastic sides.

I had waited two days after roasting.

My question: does the fact that the ground coffee was much more subject to static electricity than usual mean that I didn't wait long enough after roasting, or maybe that I under-roasted?

I have a Baratza Vario. If you've used one of these, you know what I mean about the static-free coffee receptacle. (I don't use the optional single-cup attachment.)

The coffee tastes very good, which is really the only thing I should be concerned about, I suppose. Still, I'm trying to understand this new phenomenon.

Thank you.
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Netphilosopher
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Posted Fri Mar 15, 2013, 10:09am
Subject: .
 

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steamer
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Posted Fri Mar 15, 2013, 1:42pm
Subject: Re: Static electricity and post-roast resting
 

I have notice that when I use my drum roaster or get some drum roasted beans I do not get the static. When I get fluid bed roasting beans, I do have a static problem.
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oldgearhead
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Posted Sat Mar 16, 2013, 6:34am
Subject: Re: Static electricity and post-roast resting
 

Humm..some complicated answers to an easily solved problem.
I still use my Grandmother's solution: dip two fingers under a running stream of water, shake a few drops onto the beans, shake them up, and drop them into the grinder. I always weigh my beans before grinding so I use the cup they were weighed in to add the drops of water. If that doesn't do it for you, try three fingers..

oldgearhead: DSC_8322.jpg
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rsnidjik
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rsnidjik
Joined: 23 Oct 2003
Posts: 74
Location: Dislocated
Expertise: I love coffee

Espresso: PID'd Silvia 230v, 110°...
Grinder: Baratza Vario
Vac Pot: nope
Drip: nope
Roaster: West Bend Poppery 1500W; am...
Posted Sun Mar 17, 2013, 12:14pm
Subject: Re: Static electricity and post-roast resting
 

Thank you *very* much, Netphilosopher, steamer and oldgearhead (your names correspond well with the nature of your replies, by the way!).

I'm glad to hear that my "problem" isn't unusual, nor is it necessarily a problem. And, if it is a problem, it's easily solved.

Interestingly, later grinding sessions from the same batch of beans are producing little or no static. So ... well, I just don't know, but it sounds like if this is my biggest problem, I'm doing pretty well.
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Netphilosopher
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Posted Mon Mar 18, 2013, 5:18am
Subject: .
 

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rsnidjik
Senior Member
rsnidjik
Joined: 23 Oct 2003
Posts: 74
Location: Dislocated
Expertise: I love coffee

Espresso: PID'd Silvia 230v, 110°...
Grinder: Baratza Vario
Vac Pot: nope
Drip: nope
Roaster: West Bend Poppery 1500W; am...
Posted Mon Mar 18, 2013, 7:31am
Subject: Re: Static electricity and post-roast resting
 

Netphilosopher Said:

So, is your relative humidity changing?

Posted March 18, 2013 link

No significant change over the period in question.

Netphilosopher Said:

Or do you store at room temperature?  That's a potential source for moisture absorption...

Posted March 18, 2013 link

Yes, I do. I'm roasting in small batches and consuming it quickly. I thought it would be fine to store it at room temp.

My stash of green beans is also at room temperature.

Is either of these practices a problem?

Thanks.
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Netphilosopher
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Posted Mon Mar 18, 2013, 7:12pm
Subject: .
 

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