Chalk line Origin

“Snapping a line,” a technique familiar in ancient Egypt, is employed in modern building construction. The procedure uses a taut chalk-covered cord that is stretched between two points: the cord deposits a straight line of chalk when it is plucked and snapped onto the surface. After 5,000 years the only change in this technique is that, whereas the Egyptians used wet red or yellow ochre, the modern craftsperson follows the method of Greek masons who employed white and red chalks in addition to wet ochre.

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