Colloidal Stability

Question 1

Define colloidal stability

Answer 1

Two macro particles that combine and form a single particle that is visible to the eye. (Tannin + Protein)

Question 2

What are the components of beer haze?

Answer 2

Tannins + Proteins = (polyphenols)

Question 3

What are 3 negative factors that may promote haze formation in beer?

Answer 3

O2
Agitation
Metal ions

Question 4

3 common modern chillproofing methods

Answer 4

PVPP (denatures tannins)
Silica gel
Tannic Acid
Bentonite Clay (all denature proteins)

Question 5

What do chill proofing treatments attempt to change in beer?

Answer 5

The production of polyphenols