The Great Bottle Opener Giveaway

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > whole grain vs. direct sunlight, who wins?

Reply
 
LinkBack Thread Tools
Old 04-17-2012, 02:14 AM   #1
hopdropper
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2011
Location: bozeman, montana
Posts: 75
Liked 4 Times on 3 Posts

Default whole grain vs. direct sunlight, who wins?

question...so we've got this new store in town that just started to carry bulk grains...awesome, right? couldn't be happier to have a LHBS that sells grain by the oz, or 50 lb bag if needed. no more shipping and handling charges. but here's the deal....they probably have 30+ varieties of grain and they're stored in those clear plastic cereal/coffee bean dispensers you see at some grocery stores (you know, where you pull the little lever and the stuff pours out the bottom). thing is, the grain station sits up next to a huge plate glass window with southern exposure...for most of the year that equals tons of direct sunlight all day. i'm fairly new to AG brewing...but i got to imagine that ain't good for the grain? we're not a big city so i don't imagine they move too much product....just wondering, how much UV exposure will turn grain evil? is it worth letting the manager know? thanks in advance!

__________________
hopdropper is offline
 
Reply With Quote Quick reply to this message
Old 04-17-2012, 02:24 AM   #2
passedpawn
Moderator
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
passedpawn's Avatar
Recipes 
 
Join Date: Apr 2009
Location: ☼ Clearwater, FL ☼
Posts: 18,096
Liked 2958 Times on 1876 Posts
Likes Given: 2501

Default

Quote:
Originally Posted by hopdropper View Post
question...so we've got this new store in town that just started to carry bulk grains...awesome, right? couldn't be happier to have a LHBS that sells grain by the oz, or 50 lb bag if needed. no more shipping and handling charges. but here's the deal....they probably have 30+ varieties of grain and they're stored in those clear plastic cereal/coffee bean dispensers you see at some grocery stores (you know, where you pull the little lever and the stuff pours out the bottom). thing is, the grain station sits up next to a huge plate glass window with southern exposure...for most of the year that equals tons of direct sunlight all day. i'm fairly new to AG brewing...but i got to imagine that ain't good for the grain? we're not a big city so i don't imagine they move too much product....just wondering, how much UV exposure will turn grain evil? is it worth letting the manager know? thanks in advance!

That's a good question. I'm really surprised that anyone selling a food product would put it into the light like that.

The good news is that plastic does not pass UV at all. Still, a little bit over a long time could have some effect. Or maybe not.

I would think, if anything, the exposure would act to dry it more, which would prolong it's life. Hard to say what the affect on the enzymes would be. It's possible they denature more quickly, but that's just a possibility - I've no idea really. Just tossing out some food for thought.
__________________
try to earn what lovers own
passedpawn is offline
 
Reply With Quote Quick reply to this message
Old 04-17-2012, 02:32 AM   #3
hopdropper
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2011
Location: bozeman, montana
Posts: 75
Liked 4 Times on 3 Posts

Default

huh, i didn't realize plastic didn't pass UV...that's good to know. the bins probably only hold 20 lbs each. so i'd imagine the more popular grains get moved through pretty quick, thus limiting their exposure to direct sunlight. i picked up some smoked malt today and kinda started to wonder how long it might have been there...

__________________
hopdropper is offline
 
Reply With Quote Quick reply to this message
Old 04-17-2012, 12:19 PM   #4
stageseven
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Delaware
Posts: 389
Liked 8 Times on 7 Posts

Default

I'm not an expert on the topic by any means, but AFAIK there isn't really any negative effect caused by grain being exposed to sunlight. Hops would be a different story. However, I would be more concerned with the grains not really being in a well-sealed container that they would absorb more moisture than normal, and stale faster or possibly even mold. Malted grain should have a residual moisture somewhere in the 4% range, which is well below the comfortable humidity range for people. If you pick up the grain and it's soft instead of crisp or crunchy it hasn't been sealed well and has absorbed moisture.

__________________
stageseven is offline
 
Reply With Quote Quick reply to this message
Old 04-17-2012, 12:41 PM   #5
ArcaneXor
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2007
Posts: 4,322
Liked 68 Times on 66 Posts
Likes Given: 10

Default

Sounds like a weevil farm in the making!

__________________
The Fiesty(sic) Goat Brewery est. 2007 & Clusterfuggle Experimental Ales est. 2009
Planned: Dark Mild w/ 002, Dark Mild w/ 028, sLambic II, Flanders Red II
Primary: Fat Man Porter w/ 1469, Fat Man Porter w/ 005, sLambic I
Secondary: Orange Blossom Mead, Flanders Red I
Kegged: Centennial Falcon w/ Conan, Centennial Falcon w/ Denny's, Barrel-aged Fat Man Porter, Belgian Dark Strong, Huell Melon Pale Ale
Bottled: Flanders Red I
ArcaneXor is offline
 
Reply With Quote Quick reply to this message
Old 04-17-2012, 12:45 PM   #6
passedpawn
Moderator
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
passedpawn's Avatar
Recipes 
 
Join Date: Apr 2009
Location: ☼ Clearwater, FL ☼
Posts: 18,096
Liked 2958 Times on 1876 Posts
Likes Given: 2501

Default

Quote:
Originally Posted by ArcaneXor View Post
Sounds like a weevil farm in the making!
You got that right.
__________________
try to earn what lovers own
passedpawn is offline
 
Reply With Quote Quick reply to this message
Old 04-17-2012, 02:37 PM   #7
TyTanium
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2011
Posts: 3,944
Liked 542 Times on 382 Posts
Likes Given: 415

Default

If their turnover is good, it won't matter much.

Ask the store owner about it. Good conversation starter, at least.

__________________
TyTanium is offline
 
Reply With Quote Quick reply to this message
Old 04-17-2012, 03:30 PM   #8
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 2 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 21,823
Liked 899 Times on 600 Posts
Likes Given: 26

Default

I wouldn't be as worried about the UV as much as the heat.

__________________
BrewHardware.com
Sightglass, Refractometer, Ball Valve, Weldless bulkhead, Thermometer, Decals, Stainless Steel Fittings, Compression Fittings, Camlock Quick Disconnects, Scale, RIMS tube, Plate Chiller, Chugger Pump, Super Clear Silicone Tubing, and more!

New Stuff?
Bobby_M is online now
 
Reply With Quote Quick reply to this message
Old 04-17-2012, 07:49 PM   #9
BigBlue10EM
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2012
Posts: 11
Default

I don't think it would hurt. Very little UV light can get through even clear glass.

__________________
BigBlue10EM is offline
 
Reply With Quote Quick reply to this message
Old 04-17-2012, 07:51 PM   #10
passedpawn
Moderator
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
passedpawn's Avatar
Recipes 
 
Join Date: Apr 2009
Location: ☼ Clearwater, FL ☼
Posts: 18,096
Liked 2958 Times on 1876 Posts
Likes Given: 2501

Default

Quote:
Originally Posted by BigBlue10EM View Post
I don't think it would hurt. Very little UV light can get through even clear glass.
Maybe the windows were fused silica. That's what I use for UV windows.
__________________
try to earn what lovers own
passedpawn is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Outdoor brewing and sunlight bierandbikes All Grain & Partial Mash Brewing 39 12-16-2012 11:09 PM
Direct Heat to Mash Tun? Old-Ned All Grain & Partial Mash Brewing 4 02-12-2012 01:32 AM
direct fire MT or HERMS?????? dblott1 All Grain & Partial Mash Brewing 1 08-20-2011 05:46 PM
Why not bill direct in to mash tun? Chipster27 All Grain & Partial Mash Brewing 12 11-19-2010 11:52 PM
first direct heat mash ski36t All Grain & Partial Mash Brewing 9 04-30-2007 01:51 PM