Gel pen

The United States Secret Service has maintained the International Ink Library for many decades.

[3] The first gel pens were produced by Sakura Color Products of Osaka, Japan.

[4] The first gel pen to be released commercially was the Ball sign 280,[5] which was sold by Sakura Color Products in Japan.

[6] Following this, Crayola began producing pens with thicker bodies, marketing them to children.

The gels of these pens were made up of metallic sparkles and fluorescent colors, popular among artists for their easy control and smooth drawing capability.