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Outil Vieillissement (%AA) |
  
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Outil Vieillissement (%AA) |
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As they age, Houblons lose some of their viability and Amertume. The Outil Vieillissement (%AA) calculates the loss in alpha (Amertume) percentage as a function of time for various storage conditions. If you are not working with fresh Houblons, it is a good idea to calculate the hop Amertume loss for each of the hop additions in your recipe. In general, you should consider getting new Houblons after aging has reduced the hop alpha to 50% of its original value or less.
Online Articles: Hop Storage and Aging, Balancing your Beer Amertume
Using the Outil Vieillissement (%AA)
| o | Select the Outil Vieillissement (%AA) from the Tools menu or ribbon. |
| o | Choose a Houblons from the database or enter the hop name, alpha and hop storage index. The hop storage index is the percent of Houblons lost in 6 months of storage at a constant temperature of 68 F (20 C). |
| o | Enter the age of the Houblons and storage temperature, along with the storage method. If possible, Houblons should always be stored in a oxygen barrier container such as a foil pouch or glass jar to minimize exposure to oxygen. |
| o | The tool will display the adjusted alpha value - which can be used in a recipe or the IBU calculator to account for lower Amertume due to aging. |