ABOUT | CATEGORIES | Worlds of David Darling | ADVERTISING | CONTACT

A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site chalk line A piece of string or cord that is coated with chalk. The line is stretched tightly between two points and then snapped to release a chalky line omto the surface. A piece of string rubbed with chalk can be used for the odd occasion. But for frequent use, a mechanical self-chalking line is much more convenient. A mechanical self-chalking line is a metal box containing a line on a reel. The box is filled with colored chalk powder. The line is automatically chalked each time it is pulled out of the box. Some models have a point on the end of the box so it can also be used as a plumb bob. Related category    • TOOLS Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP