As a result, brewers in England began to investigate on the subject. It was known that hops act as an antiseptic preventing the growth of bacteria and alcohol creates a medium where it does not allow the growth of microbes. These two parameters were what those the brewers at the time started to modify. The solution came from a recipe created by George Hodgson of Bow Brewery, transforming a recipe that was already made from a Pale Ale, where the amount of hops increased considerably and alcohol resulting in a very bitter beer, alcoholic, with a lot of foam and that endured the long and hot trip to India, creating what we know today as IPA-style beers. The IPA is a pale ale beer of high fermentation with a high alcohol level of over 6% and with an important bitterness exceeding 40 IBUs. It is a beer balanced between bitterness and sweetness, intense, tasty, very aromatic and with good body. An important area to take into account when preparing this type of beer is the water to use, not in its quantity, but inits composition, of both minerals and salts. Many people have written on this subject, with contradictory arguments and resulting in different water profiles. In general, you should use water low in bicarbonates and high in sulphates, and with some calcium and magnesium.
According to John Palmer and Colin Kaminski in his book “Water” the profile of the water to be used in this style of beer should be:
- Ca: 50 – 150 ppm
- Alkalinity: 40 – 120 ppm
- Sulphates: 100 – 400 ppm
- Chlorides: 0 – 100 ppm
One of the most famous IPA beers is the Punk IPA Brewdog. It is a refreshing beer, very drinkable, with aromas of pine, floral, citrus and tropical fruits, is a very drinkable and simple beer in malts to highlight the flavors of hops. Created by brewers James Watt and Martin Dickie, in a small brewery in Aberdeenshire, (Scotland) in 2007 together with a bold marketing campaign, they achieved a revolution in the craft beer world, reaching to thirty Brewdog bars today and exporting to more than fifty countries. It is one of the fastest growing brands in recent times in the United Kingdom, an example of good know how to take an expanding company and bring good and innovative products to the market.
|RECIPE -PUNK IPA|
|DI 1.054||ABV 5,60%|
|DF 1.012||IBU 43|
|Total water 30,4 liters
Water for mix 11,7 liters
Water for washing 18,7 liters
Total liters of beer resulting: 20 liters
|Malt Pale Ale 7 EBC 92,5% 4,31Kg
Malt Crystal 120EBC 7,5% 0,38Kg
Total Grain 4,690kg
|Ahtanum 80 minutes boiling for 25 IBU
Chinook 15 minutes boiling for 10 IBU
Ahtanum 15 minutes boiling for 8 IBU
Nelson Sauvim 5g
Nelson Sauvim 20g
|YEAST Wyeast 1056 American Ale|
PROCESS AND CHARACTERISTICS OF THE EQUIPMENT
Recipe calculated for an equipment with 75% yield and with an evaporation in boiling of 4 liters per hour.
- Mix with a ratio of 2.5 liters of water per kilogram of grain.
- 149F for 45 minutes. 162F for 15 minutes.
- Mashout at 172F.
- Volume of grape juice in pot 25.3 liters.
- Density before boiling 1.043.
- Boiling time 80 minutes.
Ferment at 66F. Dry Hop at 14ºC for 5 days. Ripen at 57F for 15 days.
Carbonate to 2.2 vol of CO2 or if you prefer with 6.2 grams of dextrose per liter at 66F for 1 week and save to mature at 57F for a minimum of 3 weeks.