Ink jet recording method
AssigneeFuji Photo Film Co., Ltd.
InventorKeitaro Aoshima
Life of this patent
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Abstract
When a drive frequency for an electrode used to cause an electrostatic force to act on an ink composition is assigned A, and a division frequency for a thread is assigned B, a relationship of A≧5 kHz and B/A≧5 is met, and a division frequency for the thread is reduced for a time period required to apply a pulse voltage to the electrode in order to eject the ink composition. As a result, it is possible to provide an electrostatic ink jet recording method with which excellent gradation controllability and controllability for dot diameters in a shadow area can be realized.
Claims10
An ink jet recording method comprising the steps of:
- causing an electrostatic force to act on ink composition obtained by dispersing charged particles containing colorants in a dispersion medium;
- generating a thread of said ink composition on a nozzle;
- and
- dividing said thread into ink droplets to eject said ink droplets of said composition through said nozzle;
- wherein
- a relationship of A≧5 kHz and B/A≧5 is met when a drive frequency for an electrode used to cause said electrostatic force to act on said ink composition is assigned A, and a division frequency for said thread is assigned B;
- and
- said division frequency for said thread is reduced for a time period to apply a pulse voltage to said electrode to eject the ink composition.
An ink jet recording method comprising the steps of:
- causing an electrostatic force to act on ink composition obtained by dispersing charged particles containing colorants in a dispersion medium;
- generating a thread of said ink composition on a nozzle;
- and
- dividing said thread into ink droplets to eject said ink droplets of said composition through said nozzle;
- wherein
- said ink composition having an electric conductivity of 10 to 3,000 pS/cm is used;
- electric field having strength of 1×105 to 3×107 V/m is applied to said thread;
- and
- said ink composition is supplied to said nozzle at a rate of 1×10−6 to 1×10−3 cc/sec.
Dependencies are inferred from the claim text.