From Home Brewing Wiki
Brewing additives are anything that is added to beer with an intent to do anything except add fermentable sugar (see fermentable adjuncts) or add a specific flavor to the finished beer (see flavoring agents). These can include substances added to the mash or the boil or during fermentation or bottling. The most common brewing additives are finings, used to clear the finished beer, and water treatment agents designed to change the water chemistry or mash pH.
[edit] Finings
| Type | Use | Time | Use For | Notes
|
| Clearfine
| Secondary | 1 day | Clarity | Commercial blend of animal collagen and polysaccarides that helps rapidly precipitate yeast and tannins. Mix with 2 oz cold water and add after fermentation has completed.
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| Gelatin
| Secondary | 5 hours | Clarity | Clear, unflavored gelatin can be purchased from your grocer. Aids in settling yeast. Prepare in 1 pint of water by heating gently until dissolved. Add before bottling. Do not boil.
|
| Irish moss
| Boil | 10 minutes | Clarity | Fining agent that aids in the post-boil protein break. Reduces protein chill haze and improves beer clarity.
|
| Polyclar
| Secondary | 1 day | Chill Haze | Plastic powder that reduces chill haze by removing tannins and proteins. Add to secondary after yeast has settled. Amounts vary by manufacturer -- check instructions before adding. Do not boil.
|
| Whirlfloc Tablet
| Boil | 15 min | Clarity | Aids in clearing yeast and chill haze. Easy-to-use tablet form.
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[edit] Other additives
| Type | Use | Time | Use For | Notes
|
| Amylase Enzyme
| Primary | 3 days | Fermentation | Enhances fermentation and lowers final gravity by breaking down complex starches. Produces light bodied, high alcohol beers. Add when pitching yeast.
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| Ascorbic Acid
| Bottling | 5 min | Preservative | This is Vitimin C. Adding at bottling time to wine and soda as a preservative. Not recommended for beer due to the off-flavors it might add.
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| Heading Liquid
| Bottling | 5 min | Head Retention | Aids head formation and retention. Mix into beer before bottling.
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| Malto-Dextrine
| Boil | 5 min | Adds body | Malt bases sugar that is less than 5% fermentable. Increases the body and mouth-feel of the beer and adds slight sweetness.
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| Yeast Nutrient
| Primary | 3 days | Fermentation | Gives yeast nutrients for healthy fermentation. Not needed for most beers, but good for those with a high percentage of adjuncts. Add before yeast.
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