MAKING A LIQUID ELECTROPHOTOGRAPHIC (LEP) PASTE

摘要

A method of making a liquid electrophotographic (LEP) paste is disclosed herein. A base paste is made by forming a dispersion of a pigment and a non-polar carrier, adding a transparent resin dispersion to the pigment dispersion to form a dispersion mixture, and homogenizing the dispersion mixture. The transparent resin dispersion includes a polymer dispersed in a non-aqueous carrier. The homogenizing may be accomplished by agitating the dispersion mixture at a frequency of less than 1 kHz, thereby forming the paste.

主权项

1. A method of making a liquid electrophotographic (LEP) paste, comprising:
making a silver base paste by:
forming a silver dispersion of a colorant and a non-polar carrier, the colorant being chosen from i) a pigment having a silver appearance or ii) a combination of the pigment having the silver appearance and an other pigment having a pearlescent optical property;adding a transparent resin dispersion to the silver dispersion to form a dispersion mixture, the transparent resin dispersion including a polymer dispersed in a non-aqueous carrier; andhomogenizing the dispersion mixture, the homogenizing being accomplished via a non-impact homogenization process operating at a frequency of less than or equal to 1 kHz; and mixing a predefined ratio of the silver base paste and a colored paste, thereby producing the LEP paste which exhibits a color that matches an industrial color standard when formed into a final printable ink.