Improving Foam and Head Retention with PGA

PGA, or Propylene Glycol Alginate, can be used to improve the stability of beer foam. It is derived from kelp.
Use 4 to 8g per HL (40 to 80ppm) with a maximum of 100ppm.
Mix with 30 to 40*C water at a rate of 20g PGA per liter of water.
Mix at high shear force (blender works well) for 30 to 60 minutes
Filter the mixture, and add the thick liquid to the beer, after all other fining is done, as well as filtration.
Avoid any shear force after PGA is blended in beer, to prevent it from gumming up and creating haze.
You will need:
PGA - goo.gl/25pJrH
Accurate Scale for small amounts - amzn.to/29QxoFS
Accurate Scale for larger amounts - amzn.to/2aTvu76
Blender - amzn.to/2bVgILv
Reusable Stainless Steel Filter (optional) - amzn.to/2bVgUKJ

[@JoshOB21]

Interesting! Need to see results though..

[@LothairApoclyane]

Can you just throw in a small amount of powder before bottling? I thought it was water soluble. Will it not dissolve in solution of brewed beer? Looking for a simple solution for small one gallon brews...

[@BrewingViking]

Absolutely. You would be throwing away a lot more beer than what is needed. You can stain a few milliliters instead of an entire beer.

[@LothairApoclyane]

Can you freeze the propylene glycol mixture? Will it have the same properties after it thaws?

[@BrewingViking]

I don't know.

[@FLJohnson]

You misspelled propylene.

[@BrewingViking]

I fixed it. Thank you!