There are separate standards/requirements for pen caps and end plugs in writing and markings instruments for children up to 14 years of age for reducing risk to asphyxiation.
These are detailed below
Expensive and professional pens and refills are excluded
|BS7272 Part 1||British Standard for detachable pen caps
|BS7272 Part 2||British Standard for pen end closures and plugs
BOOK YOUR SAFETY TESTS