Amorphous silica is used to improve the flow and fluidity of the toners. It ensures control of triboelectric charge of the toner and stabilizes its composition; it serves as an auxiliary agent for the transfer of a toner solution to the paper.

As an additive to toners amorphous silica is used in the form of grades FUMISIL M120, FUMISIL200, FUMISIL300, and FUMISIL380 in the concentration from 0.2% to 2%.