dresseur à diamants multiples

CONT: Several, usually seven, smaller diamond stones are mounted in spaced relationship across the working surface of the nib. In some types of tools more than a single layer of such clusters is set at parallel levels in the matrix, the deeper positioned layer becoming active after the preceding layer has worn away.
OBS: Intended for straight face dressing and permits the utilization of smaller, less expensive diamond stones.... The multiple point contact permits faster cross feed rates during truing...