<>继续google,iso 11540规定对于直径小于16mm的笔,笔帽上孔的通气量至少要能达到8升/分钟,pelikan也在遵循,只不过限于其认为可能会为儿童使用的款式中。</P>
<>下面转自Pelikan的Q&A</P>
<>What does ventilated cap mean and why has the pointed cap of the Geha 204 been changed?</P>
<>Today, all of the caps of the fibre-tip pens which are mainly used by teenagers under 14 have to comply with the ISO 11540 standard. This standard regulates the design of fibre-tip pen caps in order to prevent total blockage of the windpipe if a cap is swallowed. This ISO standard was issued by the EC after several deaths occurred which were caused by suffocation resulting from caps being swallowed. This standard guarantees an air-permeability of at least 8 l/min and is meant for caps of fibre-tip pens whose diameter is smaller than 16 mm. The pointed cap of the Geha 204 did not have the ISO standard and therefore had to be changed. <br></P>