Re: How about white tac? | Forum — The Modern Antiquarian

Rombald’s Moor 8

Image by Chris Collyer

Calling RombaldII

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RombaldII Jun 24, 2005 07:45:11

Replying to Lubin

>>Why not try rubbing some earth to form an outline.I have used peat a few times on Dartmoor and it worked a treat,and washes off with the first rain.<<

So earth and peat are of, because they are natural is OK but Calcium Carbonate is unnatural so totally bad?
So a bit of chalk rock would be OK but not the same thing purified and shaped into sticks.
Methinks there is a bit of double standards there.

The most damaging stuff I have seen is a cup filled with sheep droppings. Stong stuff is Sh*t

rocknicker Jun 24, 2005 08:34:50

Replying to RombaldII

it's to do with abrasion as much as anything else.

The Eternal Jun 25, 2005 02:06:56

Replying to RombaldII

Sorry, but it's abrasion that's the problem. If everyone rubbed chalk / soil/ peat / sheep shit / anything with particles onto a rock, then in time it will get eroded. Badly. Very badly, come to think of it.

TE's equation of rock art erosion: E=mc2
Where E is erosion (over a predescribed period of time)
m is vigourousness of rubbing, (i.e. mass imposed on the particulate as force F, where F=ma)
c (a constant) is the speed of light. Note well, that if the user exceeds this speed of rubbing, he will have completely eroded the rock carving before he has begun applying the abrasive material.

Yours cosmologically,