Provided is an object producing method including a powder layer forming step of forming a layer of a powder containing sinterable particles, an object forming liquid applying step of applying an object forming liquid to the layer of the powder to form an object forming region, and a sintering inhibiting liquid applying step of applying a sintering inhibiting liquid to the layer of the powder to form a sintering inhibited region in which sintering of the particles is inhibited, and includes a layer laminating step of sequentially repeating these steps to form a laminate. The object forming region and the sintering inhibited region adjoin each other. The sintering inhibiting liquid contains a first resin. The sintering inhibited region contains the first resin or a second resin derived from the first resin. A predicted amount of a residue calculated by a predetermined method is 800 ppm or greater.

A metallic unpainted injection molding for a vehicle is disclosed. The metallic unpainted injection molding for a vehicle is molded by injecting metallic resins into a molding part inside an injection mold through a plurality of gates to be molded, wherein at least a groove line is molded in a boundary section where metallic resins meet each other in the molding part.

A liner for a crisp plate includes ceramic nanoparticles and a polymer material combined with the ceramic nanoparticles to provide a mixture. A network of carbon nanotubes is embedded within the mixture to form a composite matrix, wherein the carbon nanotubes are unidirectionally aligned within the composite matrix.

The invention provides a method for producing a 3D item by means of fused deposition modelling, the method comprising a 3D printing stage comprising layer-wise depositing an extrudate comprising 3D printable material, to provide the 3D item comprising 3D printed material, wherein the 3D item comprises layers of 3D printed material, wherein the method further comprises controlling a first temperature T.sub.1 of the 3D printable material within a first temperature range, wherein the 3D printable material comprises a thermoplastic host material and a dopant material in the range of 1-20 vol. %, the dopant material comprising polymeric flake-like particles having a metal coating, wherein the 3D printable material has an optical property that irreversibly changes from a low-temperature optical property to a high-temperature optical property when increasing a temperature of the 3D printable material over a change temperature T.sub.c, the optical property being selected from the group consisting of reflection, transmission, luminescence, absorption, and color, wherein the change temperature T.sub.c is within the first temperature range, wherein during at least a first part of the 3D printing stage the first temperature T.sub.1 is below the change temperature T.sub.c, and wherein during at least a second part of the 3D printing stage the first temperature T.sub.1 is above the change temperature T.sub.c.

Methods for in-situ solution heat treating an additively manufactured metallic component in order to increase the mechanical properties thereof and systems to perform the same. The method can include depositing filler material on a substrate forming a deposition layer, measuring the temperature of a heat affected zone corresponding to the deposition layer, and solution heat treating the deposition layer subsequent to the depositing and proximate to the deposition head. The solution heat treating can include heating the deposition layer to a solution temperature so as to achieve solution heat treatment and controlling the cooling rate of the deposition layer to at or above the critical cooling rate of the filler material until a target temperature is reached. Optionally, the method can include inducing an electron flow in the deposition layer to electromagnetically stir molten filler material in the heat affected zone.