'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: http://insder.co/HowItsMade Insider is great journalism about what passionate people actually want to know. That’s everything from news to food, celebrity to science, politics to sports and all the rest. It’s smart. It’s fearless. It’s fun. We push the boundaries of digital storytelling. Our mission is to inform and inspire. Subscribe to our channel and visit us at: https://www.insider.com Insider on Facebook: https://www.facebook.com/insider/ Insider on Instagram: https://www.instagram.com/insider/ Insider on Twitter: https://twitter.com/thisisinsider Insider on Snapchat: https://www.snapchat.com/discover/Insider/4020934530 Movies Insider on Snapchat: https://www.snapchat.com/discover/Movies_Insider/9616609930 Insider on TikTok: https://www.tiktok.com/@insider How Highlighter Pens Are Made | Insider'
Tags: highlighter , INSIDER , highlight , how it's made , pens , nib , highlighter pens , pen nib , highlighter factory , plastic pellets , pen mold , pen factory
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