| 摘要 |
<p>A stamp pad is moistened with a colourless ink dissolved in an organic solvent. The ink is the kind used in carbonless copy paper systems, which becomes coloured when it comes into contact with the corresp. prepared paper. The pad is for use with rubber stamps, etc. and also for taking impressions of other objects that are better not marked with ink, e.g., it offers a clean way of taking fingerprints.</p> |
