Irish Sout - what is this fizz

[stephen1546]

Hi

Poured a irish stout and I often notice with my brews a fizz coming up from the bottom of the pint. Is it just the carbonation?.

 

[Clint]

Has your glass got dimples or such like?

 

[stephen1546]

Nah, will check for scratches at the bottom of the glass when I've finished this ipa I've just Poured. I remember the pubs used to do this back in the day to get a decent head

 

[The Baron]

Yes its the carbonation it also gets magnified if you are using a nucleated glass(ones with etchings in the bottom) these are put there to aid the co2 to come out and carbonate the beer however stout should be drunk with a low carbonation level so a non-nucleated glass is better

 

[stephen1546]

Thanks very much for the info. Appreciated.