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 inexpensive food-safe wire mesh?
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| bvwelch |
Posted on 02/08/2010 1:31 PM
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 1 1/2 Pounder  Posts: 1064 Location: Albertville, AL Joined: December 27, 2007 |
Greetings, I'm doing a mod to my popper, and I want to add a 'false bottom' in the heat chamber, made of wire mesh. The idea, borrowed from someone at Home-Barista, is to raise the level of the beans up, away from the bottom of the heat chamber. Beneath the false bottom, is a nice place to insert a probe for the incoming hot air temperature, only. My wife donated a grease splatter guard, which works, but is way too fine, and I think it is restricting the air flow more than necessary. Thanks for any suggestions, Bill Edited by bvwelch on 02/08/2010 1:32 PM |
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| seedlings |
Posted on 02/08/2010 2:07 PM
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 1 1/2 Pounder Posts: 4226 Location: Kansas City, Missouri Joined: June 27, 2007 |
You should be able to "form" some 1/4" hardware cloth into the proper bowl shape. CHAD Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500 Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover |
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| nufsaid |
Posted on 02/08/2010 3:46 PM
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 Newbie  Posts: 21 Location: Joined: November 16, 2009 |
if you live in the boonies your local hardware/farm co-op will have 1/4" mesh chicken wire, I use it to make rotissery drums. |
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| bvwelch |
Posted on 02/08/2010 4:35 PM
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1 1/2 Pounder Posts: 1064 Location: Albertville, AL Joined: December 27, 2007 |
Thanks Gerry, I wonder if a peaberry would fall thru? Also, would that be galvanized wire? thanks |
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| bvwelch |
Posted on 02/08/2010 4:38 PM
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1 1/2 Pounder Posts: 1064 Location: Albertville, AL Joined: December 27, 2007 |
Quote seedlings wrote: You should be able to "form" some 1/4" hardware cloth into the proper bowl shape. CHAD You've piqued my interest: 1) bowl shape? I was just thinking a flat surface, but bowl-shape sounds interesting, tell me more. 2) hardware cloth - not sure what to ask for, or where? Stainless steel I guess? thanks! |
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| John Despres |
Posted on 02/08/2010 4:51 PM
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 Administrator  Posts: 2221 Location: West Michigan Joined: January 09, 2008 |
I think most hardware cloth is galvanized. Be careful. John Respect the bean.
John Despres Fresh Roast 8, Gene Cafe, JYTT 1k, Quest M3, Mazzer Mini, Technivorm, various size presses and many more brewers. |
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| bvwelch |
Posted on 02/08/2010 5:21 PM
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1 1/2 Pounder Posts: 1064 Location: Albertville, AL Joined: December 27, 2007 |
That's why I've been cruising the kitchen-gadget aisles in stores :-) |
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| Unta |
Posted on 02/08/2010 5:58 PM
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 1 1/2 Pounder Posts: 788 Location: Fitzwilliam,New Hampshire Joined: January 26, 2010 |
stainless steel colander.. pricey but already a bowl shape. there is also ornamental aluminum fireplace grate that comes in sheet form at any home depot, popcorn kernals wont fall through the holes, so it is small enough for most any beans..
Sean Harrington
educate. |
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| endlesscycles |
Posted on 02/08/2010 6:05 PM
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 Pounder  Posts: 420 Location: Joined: April 11, 2009 |
At what temperature does galvanization become nasty?
-Marshall Hance
Asheville, NC |
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| John Despres |
Posted on 02/08/2010 7:10 PM
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Administrator Posts: 2221 Location: West Michigan Joined: January 09, 2008 |
Since zinc and lead are part of it and considered a heavy metals, I'm not sure there's a safe temperature. Everywhere I look online says NO! to galvanized use with food prep John Respect the bean.
John Despres Fresh Roast 8, Gene Cafe, JYTT 1k, Quest M3, Mazzer Mini, Technivorm, various size presses and many more brewers. |
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| Koffee Kosmo |
Posted on 02/08/2010 9:35 PM
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 Administrator Posts: 1561 Location: Brisbane Australia Joined: December 31, 2008 |
If you lived close I would give you some carbon steel perforated plate If you are going to cut a kitchen steamer insert it would be prudent to search at a yard sale or second hand shop KK I home roast and I like it. Designer of the KKTO
Roaster Build information https://forum.hom...ad_id=1142 https://docs.goog...lide=id.i0 Blog - http://koffeekosm...gspot.com/ Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex, (KKTO) Turbo Oven Home Roaster. |
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| seedlings |
Posted on 02/09/2010 7:51 AM
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1 1/2 Pounder Posts: 4226 Location: Kansas City, Missouri Joined: June 27, 2007 |
Quote John Despres wrote: I think most hardware cloth is galvanized. Be careful. John Perhaps I misunderstood, but isn't this for the cold air inlet? If so, there won't be any issue at room temperatures... Do we need to put warning signs on chain-link fences? CHAD Edited by seedlings on 02/09/2010 7:54 AM Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500 Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover |
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| bvwelch |
Posted on 02/09/2010 8:00 AM
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1 1/2 Pounder Posts: 1064 Location: Albertville, AL Joined: December 27, 2007 |
Thanks for all of the great ideas, and I'm sorry I didn't make myself more clear. This mesh goes directly inside the roasting chamber of the popper. I'll try and do a drawing later. But if you had a side view, and loaded the greens into this new modified popper, but did not turn on the power yet, you would see the beans resting on this 'false bottom' of mesh, with an inch or two below the mesh, where you could mount a TC probe, in order to measure the hot air 'environment'. I'm actually gonna give up on this mod for now, and come back to it later I think. -bill |
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| Ringo |
Posted on 02/09/2010 3:56 PM
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 Pounder Posts: 472 Location: Joined: January 14, 2010 |
You can remove galvanize with a spray of muratic acid. Get muratic acid at a pool supply store. Be carefull with it, it will really burn. |
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| Hamilton |
Posted on 02/09/2010 5:03 PM
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1/4 Pounder  Posts: 76 Location: Joined: November 09, 2009 |
Quote endlesscycles wrote: At what temperature does galvanization become nasty? I did some reading about this because my first chamber was galvanized. From what I can tell there are issues welding galvanized (~1000F or more) but the issues are not long term or toxic, they can just make you sick. I don't think our temperatures are high enough to create noxious fumes, but I went to aluminum just to be safe. If you're actually selling coffee/food items, the gov't seems to want stainless for everything anyhow. This is a tiny blurb about zinc oxide gas: http://en.wikiped...ide#Safety |
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| John Despres |
Posted on 02/09/2010 8:12 PM
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Administrator Posts: 2221 Location: West Michigan Joined: January 09, 2008 |
Pretty much everything I've looked at suggests it's a bad idea to heat galvanized metal while in contact with food regardless of temperature. I did not find one site anywhere indicating cooking food on a galvanized surface is OK. Cold prep is OK, it seems. Not cooking... Let's just stay safe, shall we? John Respect the bean.
John Despres Fresh Roast 8, Gene Cafe, JYTT 1k, Quest M3, Mazzer Mini, Technivorm, various size presses and many more brewers. |
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| seedlings |
Posted on 02/09/2010 9:50 PM
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1 1/2 Pounder Posts: 4226 Location: Kansas City, Missouri Joined: June 27, 2007 |
Quote bvwelch wrote: Thanks for all of the great ideas, and I'm sorry I didn't make myself more clear. This mesh goes directly inside the roasting chamber of the popper. I'll try and do a drawing later. But if you had a side view, and loaded the greens into this new modified popper, but did not turn on the power yet, you would see the beans resting on this 'false bottom' of mesh, with an inch or two below the mesh, where you could mount a TC probe, in order to measure the hot air 'environment'. I'm actually gonna give up on this mod for now, and come back to it later I think. -bill Aaaaahh. I understand. In this case don't use galvanized. CHAD Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500 Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover |
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| nufsaid |
Posted on 02/09/2010 10:11 PM
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Newbie Posts: 21 Location: Joined: November 16, 2009 |
peaberry definitely can go thru. I double layer it with one layer offset by 1/8" Costs a whole buck. |
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| Dan |
Posted on 02/12/2010 12:12 PM
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 1 1/2 Pounder Posts: 1662 Location: West Lafayette, Indiana, USA Joined: October 24, 2005 |
This topic comes up on a regular basis. The temperatures we roast at are not enough to create zinc fumes, as in welding, so that's not an issue. Zinc is not allowed in commericial food process equipment, but then it IS allowed in plumbing for drinking water. When roasting we don't have much moisture or acids to speak of, so reactivity isn't an issue. Frankly, I don't see a problem. I use galvanized hardware cloth for my cooling tray. Still, its easy enough to go food-safe. Just buy a coarse kitchen sieve (strainer/sifter). It is cheap, SS and already in a bowl shape. Dan |
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| Ringo |
Posted on 02/15/2010 7:53 PM
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Pounder Posts: 472 Location: Joined: January 14, 2010 |
Are you still looking for food safe mesh, I bought these disk from this I have them now. I will be using mine in my bean cooler. Nice and thick carbon steel, but will not bend. mhttp://cgi.ebay.com/Perforated-Metal-steel-discs-LIVE-STEAM_W0QQitemZ170446930531QQcmdZViewItemQQptZModel_RR_Trains?hash=item27af6dc263an, |
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