Embodiments of the present invention relate to methods for preparing high optical density solutions of nanoparticle, such as nanoplates, silver nanoplates or silver platelet nanoparticles, and to the solutions and substrates prepared by the methods. The process can include the addition of stabilizing agents (e.g., chemical or biological agents bound or otherwise linked to the nanoparticle surface) that stabilize the nanoparticle before, during, and/or after concentration, thereby allowing for the production of a stable, high optical density solution of silver nanoplates. The process can also include increasing the concentration of silver nanoplates within the solution, and thus increasing the solution optical density.

Embodiments of the present invention relate to methods for preparing high optical density solutions of nanoparticle, such as nanoplates, silver nanoplates or silver platelet nanoparticles, and to the solutions and substrates prepared by the methods. The process can include the addition of stabilizing agents (e.g., chemical or biological agents bound or otherwise linked to the nanoparticle surface) that stabilize the nanoparticle before, during, and/or after concentration, thereby allowing for the production of a stable, high optical density solution of silver nanoplates. The process can also include increasing the concentration of silver nanoplates within the solution, and thus increasing the solution optical density.

Provided is a three-dimensional object producing method that includes applying an object forming liquid to powder including a base material and an organic material to form a solidified product, and removing the powder deposited on the solidified product from the solidified product using a powder removal liquid including an organic solvent. The following formulae are satisfied

RED of non-forming part<1.20 and

RED of forming part>0.55.

The forming part is a portion of the powder to which the object forming liquid is applied and RED of the forming part is a distance between HSP of the forming part and HSP of the organic solvent. The non-forming part is a portion of the powder to which the object forming liquid is not applied and RED of the non-forming part is a distance between HSP of the non-forming part and HSP of the organic solvent.

Provided is a three-dimensional object producing method that includes applying an object forming liquid to powder including a base material and an organic material to form a solidified product, and removing the powder deposited on the solidified product from the solidified product using a powder removal liquid including an organic solvent. The following formulae are satisfied

RED of non-forming part<1.20 and

RED of forming part>0.55.

The forming part is a portion of the powder to which the object forming liquid is applied and RED of the forming part is a distance between HSP of the forming part and HSP of the organic solvent. The non-forming part is a portion of the powder to which the object forming liquid is not applied and RED of the non-forming part is a distance between HSP of the non-forming part and HSP of the organic solvent.

There is provided a protective film agent with which a workpiece is coated when the workpiece is processed. The protective film agent includes a water-soluble resin, a light absorbing agent having a flavone structure, a flavonol structure, or an isoflavone structure, and a solvent that dissolves the resin and the light absorbing agent.

There is provided a protective film agent with which a workpiece is coated when the workpiece is processed. The protective film agent includes a water-soluble resin, a light absorbing agent having a flavone structure, a flavonol structure, or an isoflavone structure, and a solvent that dissolves the resin and the light absorbing agent.

Fusing nanowire inks are described that can also comprise a hydrophilic polymer binder, such as a cellulose based binder. The fusing nanowire inks can be deposited onto a substrate surface and dried to drive the fusing process. Transparent conductive films can be formed with desirable properties.

Fusing nanowire inks are described that can also comprise a hydrophilic polymer binder, such as a cellulose based binder. The fusing nanowire inks can be deposited onto a substrate surface and dried to drive the fusing process. Transparent conductive films can be formed with desirable properties.

A coating agent can be applied to various materials without using radiation, and a medical material using the same. The coating agent containing a copolymer that contains: a monomer unit (unit A) containing a Si—O bond; a vinyl carboxylate monomer unit (unit B); and a monomer unit (unit C) containing a hydrophilic group.

In view of the problem with the prior art, the present invention addresses the following problems: providing a method that can suppress the generation of fine silver particles in a silver nanowire dispersion better than prior methods; and inhibiting, by a convenient method, particulation of silver nanowires on the anode side. A solution is a silver nanowire dispersion that contains silver nanowires, a dispersion solvent, and a chelating agent with the average diameter of the silver nanowires being not more than 100 nm, the silver nanowire dispersion being characterized in that the chelating agent content is 0.1 to 1,000 μmol/g with reference to the silver nanowire content, and the chelating agent is a prescribed aromatic heterocyclic compound having at least one imine skeleton in the molecule.