How Highlighter Pens Are Made

Highlighter pens were invented in the 1960s as a way to grab a reader’s attention. Today, highlighters are made with tinted plastic pellets that are melted into pen molds. Once assembled, a machine has the pens draw 700 to 1000 circles to make sure the batch works properly. Watch full episodes of the Science Channel series “How It’s Made“ on the Science GO app or at: The INSIDER team believes that life is an adventure! Subscribe to our channel and visit us at: https://thisisins