In 1970, BIC introduced its iconic retractable 4-Color pen, combining black, blue, green, and red ink in a single pen. The BIC 4-Color pen was introduced aroun

In 1970, BIC introduced its iconic retractable 4-Color pen, combining black, blue, green, and red ink in a single pen. The BIC 4-Color pen was introduced around 1970, allowing you to switch between blue, black, red, and green ink with a single pen. Everyone at school seemed to have one, although s…