Irish Moss 100g
£6.95
3+ in stock
Irish Moss 100g (sea moss) is a type of copper finings/kettle finings added by brewers to assist with the clearing of beer.
This is not actually a Moss, and may well not be Irish either!
It is in fact extracted from Carragheen, a dried seaweed, and is commonly used as a 'copper fining'.
Historically it was added to the coal or wood fired open copper boiling vessel during the last 20 minutes of the boil.
The Irish Moss supplies negatively charged colloids which attract the positively charged proteins, which coagulate and fall out of solution.
There is also a residual auxiliary finings effect.
It is used at the rate of 1/2 level teaspoon in every 22.5 litres of beer with this amount being doubled for high gravity beers.
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