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Re: Another means of adding chalk markings

Tony Thompson
 

Doug Harding wrote:

The chalk was a 1” stick, so the markings could be seen at a distance. Railroad chalk is still sold and used in a number of commercial applications.

      Yes, indeed, and when I was in my various lecturing jobs, I really liked it for chalk boards, students could see it well. (The chalk is kind of soft, makes a nice bold line.)

Tony Thompson
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