| 摘要 |
Disclosed herein is a method for concentrating an ink composition, wherein the method comprises the steps of: (a) providing an ink composition, the ink composition comprising a liquid carrier and particles comprising a resin and a colorant, and wherein the ink composition contains less than 0.3 mg of charge director per g of solids in the ink composition; (b) passing the ink composition between a chargeable conveyor and a first electrode, wherein a potential is applied such that the ink composition becomes adhered to the chargeable conveyor, wherein the electric field between the chargeable conveyor and the first electrode is 2000 V/mm or more; (c) passing the ink composition on the conveyor past a moving surface, wherein the ink contacts the moving surface and a potential is applied between the conveyor and the moving surface, such that the chargeable particles are disposed to move toward the conveyor and some of the liquid carrier is removed to increase the concentration of the chargeable particles in the liquid carrier on the conveyor to form a concentrated ink on the conveyor, the conveyor and the moving surface then diverging from one another, and at least some of the concentrated ink remains on the conveyor, and (d) removing the concentrated ink from the conveyor and transferring it to a storage vessel. Also disclosed herein is an apparatus. |
