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Cancerous chalk 14-Oct-2004 At 1:07:39 AM REXONASHAKEWELL

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sorry just re reread my post, and its barely understandable, what I meant to say is natural chalk may contain a trace of something thats nasty, but hey all natural granite for example is a trace radio active and is only a problem in places like england where they build deep cellars over the stuff and the heavier than air radon gas released accumulates oops off topic, but I will find out. Wow chalk might even have some Uranium

as for chalk additives dont know and dont know why they'd bother, chalks pretty drying naturally if you had to add something to keep it that way maybe that would stop it workng in the first place

anyway, found this http://list.mc.duke.edu/cgi-bin/wa?A2=ind9605&L=occ-env-med-l&F=&S=&P=8561 expert skirts the question goes ehhh