Acriflavine fusing agents for three-dimensional printing

A three-dimensional printing kit, comprising:

• a polymer build material including from about 80 wt % to 100 wt % of polymeric particles;
• and
• a fusing agent consisting of an aqueous liquid vehicle and an acriflavine dye dissolved in the aqueous liquid vehicle, wherein the aqueous liquid vehicle consists of water, an organic co-solvent, and a surfactant, and wherein the water is present in an amount ranging from about 10 wt % to about 98 wt % with respect to a total weight of the fusing agent,
• wherein the acriflavine dye absorbs energy at a wavelength ranging from 350 nm to 500 nm.

A method for three-dimensional printing, the method comprising:

• iteratively applying individual build material layers of a polymer build material including from about 80 wt % to 100 wt % of polymeric particles to a powder bed;
• based on a three-dimensional object model, iteratively and selectively dispensing a fusing agent onto the individual build material layers, wherein the fusing agent consists of an aqueous liquid vehicle and an acriflavine dye dissolved in the aqueous liquid vehicle, wherein the aqueous liquid vehicle consists of water, an organic co-solvent, and a surfactant, wherein the water is present in an amount ranging from about 10 wt % to about 98 wt % with respect to a total weight of the fusing agent, and wherein the acriflavine dye absorbs energy at a wavelength ranging from 350 nm to 500 nm;
• and
• iteratively exposing the powder bed to light energy having a peak wavelength of from about 365 nm to about 475 nm to selectively fuse the polymeric particles in contact with the acriflavine dye at the individual build material layers resulting in a fused three-dimensional object.