Method of testing holding force of bristle bundle of toothbrush, etc.

摘要

The method involves gripping each bundle of bristles (2) and pulling the bristles outwards, until the bundle is separated from the brush body (5). The pulling force is measured and at least the maximum value is registered. Each maximum force is compared with a predetermined control value, and an alarm is sounded when the maximum force is below the control value. Preferably, several bundles inside the bristle area of the brush are pulled one after another.