![Why are pencils yellow? Why do pen caps have holes? These and other wacky facts about writing instruments - YP | South China Morning Post Why are pencils yellow? Why do pen caps have holes? These and other wacky facts about writing instruments - YP | South China Morning Post](https://cdn.i-scmp.com/sites/default/files/d8/yp/images/750148f6-7de6-11e9-8126-9d0e63452fe9imagehires110911.jpg)
Why are pencils yellow? Why do pen caps have holes? These and other wacky facts about writing instruments - YP | South China Morning Post
NexDim Empire - DO YOU KNOW WHY BIC PEN CAPS HAVE HOLES ? 🤔 One of the most popular ballpoints "BIC" made it part of their design to include a small hole
![Why are pencils yellow? Why do pen caps have holes? These and other wacky facts about writing instruments - YP | South China Morning Post Why are pencils yellow? Why do pen caps have holes? These and other wacky facts about writing instruments - YP | South China Morning Post](https://cdn.i-scmp.com/sites/default/files/styles/square/public/d8/yp/images/pencil-yellow.jpg?itok=ipVe2udK)