Re: Graffiti at WKLB. | Forum — The Modern Antiquarian

FourWinds Mar 31, 2005 16:34:36

Replying to LancsLass

>> 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 :-)

LancsLass Mar 31, 2005 22:11:30

Replying to FourWinds

Oh Mr Fourwinds how petty you are

Read your original message in reply to mine you stated chalk wont wash off even if exposed to elements blah blah blah
What amazes me even more is youve taken the time to post a link to prove your theory! (fantastic)

Quote: 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 :-)

How ashamed i am to lack the knowledge of chalk that you so possess. I must brush up on Calcium Carbonate some more!

i suppose im a troll now am i?

Sheila xx

jimit Apr 1, 2005 08:45:33

Replying to FourWinds

Totally with you on all your comments here 4W, some people can be so rude :(
A slight addition ...rainwater has a slightly lower Ph ie is acidic and will disolve chalk. However in WKLB the graffiti is protected from the elements and will remain longer .
The issue is not trivial as anyone who visits this forum regularly can testify. These ancient sites have always been under threat by ignorant people and it is only by spreading our extensive knowledge can we educate those who would wish to harm them.

Graffiti at WKLB. lock

Graffiti at WKLB.