221results about How to "Excellent ejection stability" patented technology

An object of the present invention is to provide an ink composition for ink jet recording, which can produce high-quality prints and has excellent ejection stability, and to provide an ink set using the same. The ink composition for ink jet recording according to the present invention is characterized by comprising at least a compound represented by formula (I) whereinEO represents an ethyleneoxy group;PO represents a propyleneoxy group;m1, m2, m3, n1, n2, and n3 each are independently 0 (zero) or a natural number of not less than 1;EO and PO may be arranged, regardless of order in the parentheses [ ], randomly or as blocks joined together; and m1+m2+m3+n1+n2+n3 is in the range of 0.5 to 10 in terms of number average of a mixture of compounds represented by formula (I), and a colorant, provided that when, in formula (I), all of n1, n2, and n3 are zero, the ink composition further comprises glycerin.

An ink composition comprising at least one of water-soluble dyes represented by the following formulae (1) to (3) and a surfactant:

The liquid supply apparatus supplies liquid for ejection to a liquid ejection head. The apparatus comprises: a tank which stores the liquid; a liquid supply channel through which the liquid in the tank is conveyed to the liquid ejection head; a flow rate determination device which determines a flow rate of the liquid flowing through the liquid supply channel; a pressure loss determination device which determines a pressure loss in a whole of the liquid supply channel according to the flow rate determined by the flow rate determination device; a pressure loss modification device which is disposed in a portion of the liquid supply channel and modifies the pressure loss in the liquid supply channel; and a control device which controls the pressure loss modification device according to the pressure loss in the whole of the liquid supply channel determined by the pressure loss determination device, in such a manner that the pressure loss in the whole of the liquid supply channel remains substantially constant.

An ink jet recording method includes ejecting an ultraviolet-ray curable ink of which a viscosity at 28° C. is 8 mPa·s or more from a head to a recording medium, and curing the ultraviolet-ray curable ink attached to the recording medium, wherein, in the ejecting of the ultraviolet-ray curable ink, the ultraviolet-ray curable ink is heated such that a temperature of the ejected ultraviolet-ray curable ink becomes 28° C. to 40° C., and a viscosity of the ultraviolet-ray curable ink at the temperature is 15 mPa·s or less.

The invention provides an aqueous ink that can prevent clogging at an orifice due to drying of the ink though the ink contains a pigment, and can achieve high-level ejection stability required in recent years. The aqueous ink contains at least water, a water-soluble organic solvent and carbon black particles, the carbon black particles including carbon black particles having a particle size of 0.5 μm or more, wherein a proportion made up by the volume of carbon black particles having a particle size of 0.2 μm or more and less than 0.5 μm is 0.3% or less based on the total volume of all the carbon black particles in the ink, a number of carbon black particles having a particle size of 0.5 μm or more and less than 5.0 μm is 1.0×107 or less per mL of the aqueous ink, and an average particle size value of the carbon black particles is from 0.060 μm or more to 0.130 μm or less.