| 摘要 |
<p>The invention relates to a process of cleaning a substrate (11), the process comprising a first step of providing a cleaning solution (10) and a hand-held implement (1), the process further comprising a second step of applying the solution (10) onto the substrate (11) with the implement (1), characterised in that the implement (1) has an active part (15) vibrating at a frequency of at least 20 kHz with an amplitude of at least 10 νm and up to 100 νm, and whereby the substrate (11) is fibrous or a hard domestic surface.</p> |
