| 摘要 |
<p>The invention concerns a coloured liquid composition for an editing pen comprising a coloured element and water, the proportion of water by weight ranging between 10 and 30 %. It further comprises at least 40 % of a liquid constituent having a surface tension higher than 40mN/m. In a particular embodiment, the coloured element is a tracing solvent with a fluorescent appearance with basic pH, in particular hydroxypyrenetrisulphonic acid, the pH of the composition ranging between 8 and 9, and the constituent with surface tension higher than 40mN/m is triethanolamine. In that case the composition contains an acid to partly neutralise triethanolamine to obtain the basic pH, for example, hydrochloric acid.</p> |
