LIQUID ENHANCED FIXING METHOD
Printing methods are provided. In one method, an inkjet image is printed on a receiver using an inkjet ink having a liquid with a boiling point and a toner image conforming to the ink jet image is generated using toner particles with a glass transition temperature that is below the boiling point and the toner image is transferred into an unabsorbed volume of liquid ink of the inkjet image on the receiver. A first energy is applied to the toner and the liquid sufficient to bring the liquid to the boiling point without bringing a heated surface into contact therewith. The toner particles are heated above the glass transition temperature by the combination of heat from the liquid and heating of the toner particles by the radiant energy without requiring that the receiver is heated to the glass transition temperature of the toner.
1 . A printing method comprising:
printing an inkjet image one a receiver using an inkjet ink having a liquid with a boiling point;
transferring a toner image having toner particles with a glass transition temperature that is below the boiling point into an unabsorbed volume of liquid ink of the inkjet image on the receiver;
applying a first energy to the toner and the liquid sufficient to bring the liquid to the boiling point sufficient to bring the liquid to the boiling point without bringing a heated surface into contact therewith;
wherein the toner particles are heated above the glass transition temperature by the combination of heat from the liquid and heating of the toner particle by the radiant energy heats so the toner particles will cohesively bond to other toner particles and will adhesively bond to the receiver without requiring that the receiver is heated to the boiling point.
2 . The method of claim 1 , wherein the liquid has a specific heat that is less than a specific heat of the toner particles.
3 . The method of claim 1 , wherein the amount of first energy required to heat the toner particles to the glass transition temperature with toner particles in the liquid is less than an amount of first energy that would be required to heat the toner particles to the glass transition temperature if the toner particles were not transferred into an unabsorbed volume of liquid ink.
4 . The method of claim 1 , wherein the amount of first energy required to heat the toner particles to the glass transition temperature is sufficient to bring the liquid to the boiling point.
5 . The method of claim 1 , wherein the liquid conforms to the shape of the toner particles so as to provide a greater surface area of contact between the liquid and the toner particles than is provided between the receiver and the toner particles.
6 . The method of claim 1 , wherein toner particles in an unabsorbed volume of the liquid can be brought to a glass transition temperature at a faster rate than toner particles that are not in an unabsorbed volume of the liquid using an equivalent exposure to the first energy.
7 . The method of claim 1 , wherein the liquid is water or an alcohol.
8 . The method of claim 1 wherein the liquid is hydrophilic.
9 . The method of claim 1 , wherein the toner particles are sintered so that vapor pressure from the liquid can pass between toner particles so that the vapor pressure does not accumulate within the toner image.
10 . The method of claim 1 , wherein the first energy a radiant energy source.
11 . The method of claim 1 , wherein the first energy is at least one of infrared radiation, optical radiation, and radio frequency radiation.
12 . The printer of claim 1 , wherein the first energy is a flow of a heated gas directed at toner and ink.