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Graffiti at WKLB.
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FourWinds
FourWinds
10943 posts

Re: Graffiti at WKLB.
Mar 31, 2005, 16:34
>> You talk absolute rot Mr Fourwinds chalk washes away quite easily

I didn't say it doesn't wash away did I? I might do, but may I refer you to this:

http://www.brewingtechniques.com/library/backissues/issue2.3/miller.html

"Carbonate and bicarbonate differ, however, in that bicarbonates are considerably more soluble than carbonates. <b>Calcium carbonate (chalk), for example, is only slightly soluble in neutral (pH 7) water </b>; calcium bicarbonate is considerably more soluble."

You see it doesn't desolve, but particles of it will get carried in the water. If it's on a rough rock surface then it gets stuck in the surface and can not get washed away, beacause sufficient water can't get behind it to lift it up and carry it away.

School chalk isn't actually pure chalk (or even actually chalk at all in some cases) and has bits added to it to make it disolve in water.

So, next time you say someone's talking rot make sure that they are, otherwise your amazing lack of knowledge might be noticed by a few people :-)
In reply to:
Re: Graffiti at WKLB. (LancsLass)		 Replies:
Re: Graffiti at WKLB. (LancsLass)
Re: Graffiti at WKLB. (jimit)
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