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- From: M.Enderby@daresbury.ac.uk
- Subject: Re: Head calming?
- Message-ID: <1992Nov18.095035.19172@gserv1.dl.ac.uk>
- Sender: ufe@dlva ()
- Reply-To: ufe@dlva.dl.ac.uk ()
- Organization: SERC Daresbury Lab., Warrington, U.K.
- References: <1992Nov17.172702.24114@infodev.cam.ac.uk>
- Date: Wed, 18 Nov 1992 09:50:35 GMT
- Lines: 58
-
- --
- I'm afraid that the notion that REAL ALE is meant to be flat is a
- fallacy. If it is flat then it has not been kept properly !
- By its very nature, real ale (aka cask conditoned) undergoes secondary
- fermentation in the cask. It hence should contain a small amount of
- naturally produced CO2 dissolved. This is called its condition. Cellar
- management requires careful control of the condition.
- When a cask arrives in the cellar it is highly conditioned (or should
- be) as the beer has been fermenting for several days in a sealed cask
- and also severely agitated :-). On the top of a cask is a small, sealed
- hole. The centre is knocked out and this releases the excess pressure.
- A soft (porous) peg is then put in and the beer allowed to calm down.
- The purpous of this is to ensure the beer is not over conditioned.
- A hard peg (non-porous) is then put in until the beer is ready to serve
- While the beer is on service, the peg has to be removed to allow the
- beer to be drawn off, but after the hard peg is put back in to maintain
- the condition.
- Sparklers (the device which stirs up the beer when it comes out of a
- pump to give a beer a fake head) can be bad for a beer since it
- knocks the condition out of the beer and into the head.
- Even beer served on gravity should have condition. Beer without condition
- has either been looked after poorly or has been around too long (or
- too often these days) comes from the brewery with too little yeast
- for secondary fermentation.
- If there's no condition then the beer really is dead and is probably
- why many foreigners think that real ale is dish water :-).
- Attempts to liven up dead beer with extraneous CO2 fail, since the gas
- readily comes out of solution unless dosed to excessive amounts and then
- it really is unpleasant !
- To see if a beer is in good condition try tipping it slightly (say 30 deg)
- and then returning it quickly to the upright. You should see loads of CO2
- bubbles forming in the 1cm below the surface. If their are none - then
- you've got dishwater.
- Remember, the definition of real ale says no EXTRANEOUS gas. Good beer
- relies on its natural production of C02.
- Cheers,
- Mark
- (CAMRA Technical Committee)
- ========================================================================
- Mark Enderby JANET - ENDERBY@UK.AC.DARESBURY
- Systems Manager EARN/Bitnet - ENDERBY@DARESBURY.AC.UK
- SERC Daresbury Laboratory
- Keckwick Lane
- Daresbury
- Warrington tel: 0925-603353
- WA4 4AD Int:+44-925-603353
- UK fax: 0925-603174
- Cheers,
- Mark
- ========================================================================
- Mark Enderby JANET - ENDERBY@UK.AC.DARESBURY
- Systems Manager EARN/Bitnet - ENDERBY@DARESBURY.AC.UK
- SERC Daresbury Laboratory
- Keckwick Lane
- Daresbury
- Warrington tel: 0925-603353
- WA4 4AD Int:+44-925-603353
- UK fax: 0925-603174
-