Foam is an important visual representation for quality beer, but some beer styles are decidedly foam-challenged. Some recommended advanced hop products to help meet this challenge are Alpha Extract and Tetra Extract.
Alpha Extract is a concentrated, aqueous solution of α-acids ideal for improving beer foam and lacing post-fermentation without contributing any added sensorial bitterness to the final product.
- Foam stability
- Foam lacing & cling
Usage & Methods
- ≈6 grams of product per bbl. for each ppm
- >5 ppm of alpha acid can improved beer foam in beers that are 15 IBU’s or less. For beers greater than 15 IBU’s, Tetra should be used
- Include link for bench-top testing in bottles or kegs
- Good – add product to empty vessel and push with nitrogen (NOT CO2) into beer line when starting to fill tank
- Better – Add product to empty beer keg and fill with pH 8-9 adjusted de-aerated, de-ionized water and push with nitrogen (NOT CO2) into beer line when starting to fill tank
- Best – meter the concentrated product into transfer stream using a diaphragm pump. Attempt to deliver evenly throughout 80% of the transfer of beer. Dispense solution into the beer transfer stream pre filtration.
Notes & Suggestions
- Do not add to DE slurry tanks
- Make sure introduced at least 5 Meters upstream of filter
- Inject on suction side of beer transfer pump
- Diluting with beer lowers utilization and can result in precipitation of resins
- Perceived bitterness is 0.1x that of Iso-Alpha Acids and very smooth
- For dry-hopped beers, Tetra Extract is suggested
Packaging & Storage
- Only use nitrogen to purge container headspace free of air. CO2 will lower the pH of the dilution causing the product to become insoluble.
|Bitterness||Aroma / Flavor||Foam||Anti - microbial||Light Stability||Hot Side||Cold Side|
|Isomerized Kettle Extract (IKE)|
|(Potassium) Isomerized Kettle Extract (PIKE)|
|Alpha Extract 20%|
|Rho Iso-Extract 30%|
|Tetra Iso-Extract 10%|
|Hexa Iso-Extract 10%|
|Beta Bio 45%|