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Old 12-13-2007, 01:18 AM   #1
TheClosetBrewery
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Sorry if this has already been covered...didn't really know what to search for. When you buy grains to make your grain tea, you can get 60 L or 120 L, etc crystal malt...what unit is the L?

I've brewed a fair amount, but just realized I didn't know what that actually signifies.
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Old 12-13-2007, 01:21 AM   #2
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Lovibond. It is a color scale. Higher = darker, lower = lighter.

It also affects other things. Crystal 20 won't be as burnt and raisiny tasting as crystal 120 would be. This can' directly affect the flavor (as well as color) of your finished beer.

This is actually a pretty good question.
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Old 12-13-2007, 01:22 AM   #3
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L stands for Lovibond, a measurement of color for various items.

http://ourworld.compuserve.com/homep...page/color.htm
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Old 12-13-2007, 01:28 AM   #4
TheClosetBrewery
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Huh. Makes sense. I was sorta surprised not to see it in the Wiki section on the different caramel levels.

It does seem like a fairly inexact measurement scale...less specific than a measurement like using the alpha acid % to calculate bitterness (HBU I believe?). I can't really think of a better way to measure it though.
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Old 12-13-2007, 01:35 AM   #5
MikeInCtown
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Another question...

What does the little degree symbol mean when they put down the measurements like that? For example, I see the same grain types with 8L and the circle after the L and some have 10L with the little circle after the L. I think it may mean degrees, but not sure.
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Old 12-13-2007, 01:39 AM   #6
bigben
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Quote:
Originally Posted by MikeInCtown
Another question...

What does the little degree symbol mean when they put down the measurements like that? For example, I see the same grain types with 8L and the circle after the L and some have 10L with the little circle after the L. I think it may mean degrees, but not sure.
I'm pretty sure that if the degree symbol is not present, it's implied.

I don't actually know why it's in degrees, but that's just the unit that they measure the color in I believe.

 
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Old 12-13-2007, 01:39 AM   #7
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Quote:
Originally Posted by MikeInCtown
Another question...

What does the little degree symbol mean when they put down the measurements like that? For example, I see the same grain types with 8L and the circle after the L and some have 10L with the little circle after the L. I think it may mean degrees, but not sure.
Yes.
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Old 12-13-2007, 03:05 PM   #8
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The system actually measures the beer, which even for a dark stout only run to ~70L. The high number on grains are what they would produce if used exclusively.

Quote:
The SRM (standard reference method) number is defined as 10 times the absorbance of a sample at 430 nanometers measured through a .5-inch cell. The 430-nanometer wavelength corresponds to a deep blue light, and is the wavelength at which beers appear most different from each other.
SRM ~ degrees Lovibond
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Old 12-13-2007, 03:12 PM   #9
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Also, this measurement is per pound to gallon. So the assumption is, that you add say one pound of 60 L Crystal malt in 1 gallon of water the color would be 60 L. In a standard 5 gallon batch it would be 12 L for the one pound.
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Old 12-13-2007, 05:05 PM   #10
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Quote:
Originally Posted by zoebisch01
Also, this measurement is per pound to gallon. So the assumption is, that you add say one pound of 60 L Crystal malt in 1 gallon of water the color would be 60 L. In a standard 5 gallon batch it would be 12 L for the one pound.
Good info. I never thought about how that worked!

Thanks z!!!!!
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