Patent ID: 9738801
Date: 2017-08-22
CPC Classifications: C09D

Claim:
1. A method of manufacturing a metallic liquid electrophotographic ink having reduced impurities, consisting of: adding a metallic pigment slurry and a resin to a stainless steel attritor; adding ceramic grinding beads to the attritor; and performing a single grinding step consisting of grinding the metallic pigment slurry and the resin simultaneously to form the metallic liquid electrophotographic ink, wherein the grinding of the metallic pigment slurry and the resin is performed for less than 10 hours, without a change to RPM (revolutions per minute) throughout the grinding and wherein the RPM is less than 1000 RPM; wherein the metallic pigment slurry consists of a metallic pigment, a solvent, and a charge adjuvant; and wherein the metallic pigment consists of a metal selected from the group consisting of aluminum, silver, platinum, tin, copper, bronze, gold, and mixtures thereof.