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RavenWood Kolsch

From the BrewBlog of BorealBrewers – Grand Rapdis, Minnesota USA
Printed January 22, 2018

Specifics
Style: Kolsch
Contributor: Chad Haatvedt
Yield: 9 gallons
Calories: 161 (12 ounces)
ABV: 6%
ABW: 4.7%
OG: 1.050
OG (Plato): 12.39° P
FG: 1.005
FG (Plato): 1.28° P
Real Extract: 3.29° P
App. Atten.: 89.6%
Real Atten.: 73.4%
BJCP Style Info: Kolsch
O.G.: 1.044 - 1.050
F.G.: 1.007 - 1.011
ABV: 4.4 - 5.2%
Bitterness: 20 - 30 IBUs
Color: 3.5 - 5 SRM
Info: A clean, crisp, delicately balanced beer usually with very subtle fruit flavors and aromas. Subdued maltiness throughout leads to a pleasantly refreshing tang in the finish. To the untrained taster easily mistaken for a light lager, a somewhat subtle pilsner, or perhaps a blonde ale.

Commercial Examples: Available in Cologne only: PJ Früh, Hellers, Malzmühle, Paeffgen, Sion, Peters, Dom; import versions available in parts of North America: Reissdorf, Gaffel; Non-German versions: Eisenbahn Dourada, Goose Island Summertime, Alaska Summer Ale, Harpoon Summer Beer, New Holland Lucid, Saint Arnold Fancy Lawnmower, Capitol City Capitol Kölsch, Shiner Kölsch.

General Information
Method: All Grain
Malts and Grains
19.50 pounds German Pilsen Malt (2-Row) 100% of grist
19.50 pounds Total Grain Weight 100% of grist
Non-Fermentables
2 tabs Whirlfloc @ 15 minutes  
2 tbl Irish Moss @ 15 minutes  
Hops
2.00 ounces Tradition 6.5% Pellets @ 60 minutes
Type: Bittering
Use: Boil
13 AAUs
2.00 ounces Hersbrucker 2.3% Pellets @ 30 minutes
Type: Bittering
Use: Boil
4.6 AAUs
4.00 ounces Total Hop Weight 17.6 AAUs
Boil
Total Boil Time: 60 minutes
Yeast
Name: Kolsch Yeast
Manufacturer: Wyeast
Product ID: 2565
Type: Ale
Flocculation: Low
Attenuation: 75%
Temperature Range: 56–64°F
Amount: 250 ml
Mash Profile

Cereal Mash and Single Infusion Mash

Grain Temperature: 72°F Tun Temperature: 72°F
Sparge Temperature: 168°F PH: 5.4
PPG: 0 Efficiency: 0%
Notes:

Boil cereal adjuncts to add to infusion mash.

Steps

# Name Type Time Temp. Description
1 Protein Rest Infusion 30 min. 104°F

Add 30% of mash water at 111° F / 44° C

2 Protein Rest Infusion 45 min. 122°F

Add 10% of mash water at 181° F / 83° C

3 Saccharification Infusion 60 min. 150°F

Add 25% of mash water at 200° F / 93° C

4 Mash Out Infusion 10 min. 168°F

Add 35% of mash water at 208° F / 98° C

Procedure
Water Amounts Calculator
Target Final Boil Volume: 11 gallons  
Evaporation Rate: 1.5 gallons per hour  
Boil Time: 60 minutes  
Runoff Volume Needed: 12.96 gallons 11 gallons (final boil volume) ÷ 0.96 (cooling) + 1.5 gallons (boil evaporation)
Grain Amount: 20 pounds  
Grain Absorbtion: 4 gallons  
Total Water Needed: 18.46 gallons 12.96 gallons (runoff) + 4 gallons (grain absorbtion) + 1.5 gallons (equip. loss)
Mash Water Needed: 6.25 gallons based on 1.25 quarts per pound of grain
Sparge Water Needed: 12.21 gallons

18.46 gallons (total water) – 6.25 gallons (mash water)


 

Strike Water Temperature Calculator
Grain Weight: 20 pounds
Grain Temperature: 79° F
Strike Water Amount: 6.25 gallons
Target Mash Temperature: 152° F
Equipment Loss: 0° F
Strike Water Temperature: 163.7° F

YEAST : Wyeast 2575 Kolsch II  2 smack packs

 

Fermentation
Primary: 8 days @ 68° F
Secondary: 7 days @ 64° F
Lager: 30 days @ 40° F
RavenWood Kolsch
Date Brewed:  
Brewer/Assistant:  
Brew Day Data
  Target Actual
Strike Water Amount: 6.5  
Strike Water Temperature:    
Mash Temperature:    
Mash Time:    
Sparge Water Amount: 9.5  
Sparge Water Temperature:    
Pre-Boil Gravity:    
Pre-Boil Amount: 10.9  
Post-Boil Amount: 9  
Boil Time: 60  
Original Gravity: 1.050 / 12.4° P  
     
     
     
     
Brew Day Notes
 

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