Ink discharging apparatus, ink heating method, and water-based ink for recording

An ink heating method of fixing, to a recording medium, a water-based ink for recording, which is adhered to the recording medium, the ink heating method comprising heating, by a heater, the recording medium or the water-based ink for recording adhered to the recording medium,

• wherein the water-based ink for recording includes:
• a resin-dispersed pigment,
• resin fine particles of which glass transition temperature is not less than 33° C.,
• an organic solvent and
• water;
• and
• the ink heating method satisfies the following condition (I):
• 5
• ≤
• (
• Tg
• -
• Th
• )
• ≤
• 40
• ,
• condition
• ⁢
• ⁢
• (
• I
• )
• in the condition (I),
• Tg (° C.) being the glass transition temperature of the resin fine particles, and
• Th (° C.) being a maximum surface temperature of the recording medium heated by the heater.

A water-based ink for recording comprising:

• a resin-dispersed pigment;
• resin fine particles of which glass transition temperature is not less than 33° C.;
• an organic solvent;
• and
• water,
• wherein the water-based ink for recording discharged from a printing head is fixed to a recording medium in a state that the recording medium is heated by a heater so that the water-based ink for recording satisfies the following condition (I):
• 5
• ≤
• (
• Tg
• -
• Th
• )
• ≤
• 40
• ,
• condition
• ⁢
• ⁢
• (
• I
• )
• in the condition (I),
• Tg (° C.) being the glass transition temperature of the resin fine particles, and
• Th (° C.) being the maximum surface temperature of the recording medium heated by the heater.