Patent ID: 8221955

Claim:
A method of forming an ink toner, comprising: mixing a carrier liquid and a resin to form a slurry; grinding the slurry for about 1 to 5 hours at about 50° C. to 60° C. at about 500 to 800 revolutions per minute (RPM); reducing the grinding to a speed of about 25 to 150 RPM; adding a pigment to the slurry and grinding at the reduced speed for about 5 minutes to about 10 minutes until the pigment is absorbed in the slurry to form a slurry/pigment mixture, wherein the pigment is selected from optically variable pigments, thermochromic pigments, photochromic pigments, photo luminescent pigments, phosphorescent pigments, electroluminescent pigments, and combinations thereof; increasing the grinding speed to about 500 to 800 RPM; and grinding the slurry/pigment mixture at the increased grinding speed for about 15 to 45 minutes at about 25° C. to 35° C. to form the ink toner.