Chalk line

The Chalk Line ( Markierschnur ) is a tool to create longer straight lines. It is usually in interior design, used in timber and in the preparation of building services.

Today's chalk lines consist of a housing in which the cord is wound and which is filled with a colored chalk powder. When rolled off the line and this is painted with the chalk. Thus the chalk powder does not trickle out of the housing, the hole through which the cord is passed out, barely larger than the string diameter.

For this reason, the cord must be handled with care; Node or become hard plaster or mortar residues would prevent re- rolling and make the chalk line unusable. For the same reason, the device should not be rolled up wet or cord when wet.

To apply a line the ends of the cord are carefully adhered to the surface to be marked and clamped the cord taut. The housing can also be used as solder. Subtracting the cord now a piece away from the surface and let it go, it strikes the surface and the adhering chalk dust marked a straight line.