> However it will add almost invisible markings onto the paper itself That only happens on color printers. It is called Machine Identification Code (https://e

> However it will add almost invisible markings onto the paper itself That only happens on color printers. It is called Machine Identification Code (https://en.wikipedia.org/wiki/Machine_Identification_Code https://en.wikipedia.org/wiki/Machine_Identification_Code). Supposedly the reason is to trap currency counterfeiters. Black and white printers do not add such dots.