Carpets: shading

Shading is another and, unfortunately, more permanent trouble you may have with your carpets. In plain-colored velvet fabrics it is especially noticeable.

Every pile fabric is woven with all the upright tufts slanting slightly in one direction. If a dark streak or spot develops in a doorway or in front of a chair it is because the pile there has been pushed by many feet until it has been turned and "set" against the direction of the rest.

You may also cause a shaded spot if you start and finish vacuuming at the same point every time. Begin at one place in the room one day, at another the next time.