[Homeroast] aluminum for roasting

john drake.john at sbcglobal.net
Mon Apr 12 15:21:55 CDT 2010


ok, so the concensus is that aluminum is fine in terms of vapor and direct 
contact with a dry substance.

and, if i'm planning on using it for a door on the otherwise cast iron drum, 
i should have no cause for worry (nicer word for paranoia).

thanks, all!!

-john
----- Original Message ----- 
From: "Sandy Andina" <sandraandina at mac.com>
To: "A list to discuss home coffee roasting. There are rules for this 
list,available at http://www.sweetmarias.com/maillistinfo.html" 
<homeroast at lists.sweetmariascoffee.com>
Sent: Monday, April 12, 2010 3:15 PM
Subject: Re: [Homeroast] aluminum for roasting


> The danger of acid foods leaching aluminum from non-anodized vessels is 
> purely aesthetic--it negatively affects taste and darkens stuff like 
> tomatoes and citrus. No disease links have been proven, and research has 
> been long and extensive. I use stainless simply because it doesn't 
> corrode, maintains heat more evenly, and can be scrubbed six ways from 
> Sunday. (And it doesn't warp as readily).
> On Apr 12, 2010, at 3:05 PM, Joseph Robertson wrote:
>
>> Ryan,
>> This thread in getting deep into some science I also have little or next 
>> to
>> no experience with.
>> Now to include the coffee and coffee making back into this thread, when I
>> made coffee with the stove top Al. Italian espresso makers years ago, I
>> always wondered if coffee or the acid nature of it durning the brewing
>> process could in some or anyway leach some of the Aluminum from the pot? 
>> Now
>> I use and promote stainless versions I don't think about this anymore.
>> At least I wasn't till this thread started.
>> ;) Joe
>> On Mon, Apr 12, 2010 at 12:23 PM, Ryan M. Ward 
>> <silvercro_magnon at hotmail.com
>>> wrote:
>>
>>>
>>> I am not a medical person, and my chemistry background certainly does 
>>> not
>>> establish any sort of expertise. When I looked into the
>>> Aluminium/Alzheimer's issue, the impression I got is that Aluminium,
>>> although not the best thing for the body, does not enter the body 
>>> easily.
>>> The advice that I consistently saw not to cook highly acidic foods with
>>> aluminium cookware(such as spaghetti sauce). I can tell you that the 
>>> last
>>> position that I read from the Alzheimer's association stated that the
>>> hypothesis that Aluminum was a strong contributing factor leading to
>>> Alzheimer's appeared unlikely. (Again, I am not a doctor and have NO
>>> expertise on this, I am just a consumer passing along friendly 
>>> information
>>> that I have accumulated- please verify for yourself)
>>>
>>> Now, roasting-wise, what I would be concerned with is the "speed" at 
>>> which
>>> the metal heats up and cools down and how that plays into roasting
>>> consistency. As I recall from memory, the specific heat of Aluminium is
>>> pretty low which means that the your bowl will heat up quickly and cool 
>>> down
>>> quickly depending on the ambient temperature (Chemistry friends- please 
>>> stop
>>> me if I say something stupid). This is what I would consider.
>>>
>>> Now that I have commented on every technical subject that I am not an
>>> expert in, do you have any numbers that need crunching?
>>>
>>> --
>>> Ryan M. Ward
>>>
>>> *Note: This email was sent from a computer running Ubuntu Linux 9.10
>>> (Karmic Koala)
>>> http://www.ubuntu.com
>>>
>>> **Note: This signature was placed here by me and is not
>>> automatically-generated-annoying-end-of-email-spam placed here by anyone
>>> other than myself. I am a Linux nut and am doing my part to support open
>>> source software and the Linux and Ubuntu communities by getting the word 
>>> out
>>> with each email I send, I encourage you to do the same.
>>>
>>>
>>>
>>>
>>>> Date: Mon, 12 Apr 2010 11:18:40 -0700
>>>> From: theotherjo at gmail.com
>>>> To: homeroast at lists.sweetmariascoffee.com
>>>> Subject: Re: [Homeroast] aluminum for roasting
>>>>
>>>> I remember the, what I think was inconclusive studies on this.
>>> Technically
>>>> speaking I believe Al is considered a heavy metal even though it sounds
>>> like
>>>> an oxymoron. If the metal can enter my system through what ever method. 
>>>> I
>>>> will steer around using it. Remember the stove top little espresso
>>> makers?
>>>> They used to be made only of Al. Now many from Italy are Stainless.
>>>> Although the Al ones are still sold. I used to look down inside at the
>>>> decaying Al that looked like an oxidizing mineral decaying soup. Never
>>> will
>>>> I go back to and consume any amount of that questionable stuff. Give me
>>> good
>>>> Ole cast iron or stainless.
>>>> Nice for building some things not food related.
>>>> Don't mind my rambling memories. Give me a good cup of Joe and who 
>>>> knows
>>>> what I will ramble on about.????????????? ;)
>>>> On Mon, Apr 12, 2010 at 9:16 AM, Tom Ulmer <tom at transtate.us> wrote:
>>>>
>>>>> For a year or so I used an aluminum WhirlyPop to roast. Besides third
>>> eye
>>>>> development I've noticed no ill effects.
>>>>>
>>>>> I believe there was news a few years ago which attempted a correlation
>>> of
>>>>> aluminum levels in the body to Alzheimer's disease.
>>>>>
>>>>> -----Original Message-----
>>>>> From: homeroast-bounces at lists.sweetmariascoffee.com
>>>>> [mailto:homeroast-bounces at lists.sweetmariascoffee.com] On Behalf Of
>>> john
>>>>> Sent: Monday, April 12, 2010 10:36 AM
>>>>> To: HomeRoast List
>>>>> Subject: [Homeroast] aluminum for roasting
>>>>>
>>>>> does anyone know if aluminum is a safe metal to have in contact with
>>> beans
>>>>> at roast temperatures?  more specifically, i have an aluminum cookie
>>> sheet
>>>>> that i'd like to use as sheet metal for parts in fabricating a new
>>> drum.
>>>>> the drum is cast iron, but i'm thinking of using the aluminum as an
>>> exit
>>>>> door for the beans.
>>>>>
>>>>> however, if that's safe, it's got me thinking about using a turkey
>>> frying
>>>>> pot as a drum.  if it's ok for cookies, is it ok for coffee?  ...would
>>> be
>>>>> much higher temperatures.
>>>>>
>>>>> thanks,
>>>>>
>>>>> -john
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>>>>
>>>>
>>>>
>>>> --
>>>> Ambassador for Specialty Coffee and palate reform.
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>>
>>
>>
>> -- 
>> Ambassador for Specialty Coffee and palate reform.
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>
> Peace & song,
> Sandy
> www.sandyandina.com
>
>
>
>
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