Patent ID: 8308985

Claim:
A process for the preparation of inks, paints or anticorrosive treatments, comprising; providing an aqueous suspension of anionic colloidal silica having a neutral pH, which is stable over time and comprising individualized particles of colloidal silica which are not bound to one another by siloxane bonds, where said aqueous suspension of anionic colloidal silica comprises individualized particles of colloidal silica which are not bound to one another by siloxane bonds and has a pH in the range from 8.5 to 11, a specific surface in the range from 20 m 2 /g to 700 m 2 /g, a mean particle diameter in the range from 4 nm to 150 nm and having a percentage of silica of ≧5 parts by weight, is reacted with an aqueous suspension of anionic colloidal silica comprising individualized particles of colloidal silica which are not bound to one another by siloxane bonds and having a pH in the range from 2 to 3.5, a specific surface in the range from 20 m 2 /g to 700 m 2 /g, a mean particle diameter in the range from 4 nm to 150 nm and having a percentage of silica of ≧5 parts by weight, further where the mean diameter of the particle is unchanged by the process; providing a colored material; and, forming a mixture of the colloidal silica with the colored material.