Fibre-tip pens
What does ventilated cap mean and why has the pointed cap of the Geha 204 been changed?
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.
Exists black fibre-tip pen ink?
The black ink of fibre-tip pens for schools is a mixture of red, blue and yellow. The result is a very deep black. Fibre-tip pens which are used for files or documents are mixed with soot but these inks could not washed out and stored for longer times.
