An article includes a substrate with a surface, and a coating disposed over the surface. The coating includes a binder material and a plurality of porous polymer particles having pores with a variety of pore sizes including a first set of pores having a first average pore size d1 in the range 0.3≤d1/λ1≤0.7, wherein λ1 is a wavelength in the range of 250-400 nm, a second set of pores having a second average pore size d2 in the range 0.3≤d2/λ2≤0.7, wherein λ2 is a wavelength in the range of 400-700 nm, and a third set of pores having a third average pore size d3 in the range 0.3≤d3/λ3≤0.7, wherein λ3 is a wavelength in the range of 700-3000 nm, wherein the porous polymer particles have a shell which is impermeable to a liquid.

An article includes a substrate with a surface, and a coating disposed over the surface. The coating includes a binder material and a plurality of porous polymer particles having pores with a variety of pore sizes including a first set of pores having a first average pore size d1 in the range 0.3≤d1/λ1≤0.7, wherein λ1 is a wavelength in the range of 250-400 nm, a second set of pores having a second average pore size d2 in the range 0.3≤d2/λ2≤0.7, wherein λ2 is a wavelength in the range of 400-700 nm, and a third set of pores having a third average pore size d3 in the range 0.3≤d3/λ3≤0.7, wherein λ3 is a wavelength in the range of 700-3000 nm, wherein the porous polymer particles have a shell which is impermeable to a liquid.

A method for producing a layer of a device for electromagnetic radiation absorption, includes: providing a ply of powder material in the layer to be produced of the device; providing a predefined concentration distribution of particles for electromagnetic radiation absorption in the layer; providing a first binder and a second binder for the powder materials, wherein the first binder includes particles for the absorption of electromagnetic radiation, wherein the second binder includes a lower concentration of identical and/or different particles than the first binder; determining a mixing ratio between the first binder and the second binder for every position in the layer; selecting a position of the layer; mixing the first and second binder according to the mixing ratio for the selected position; wetting the powder material at the selected position using the mixed first and second binders; and repeating selecting, mixing, and wetting to produce the layer.

A composition for reducing the detectable cross-section of an object, which includes graphite selected from the group consisting of graphite flakes, particles of exfoliated graphite, graphitic nano-structures, and combinations of one or more thereof, wherein the graphite is dispersed in a coating composition. Also included are objects to which the composition are applied, and a process for reducing the detectable cross-section of an object.

A composition for reducing the detectable cross-section of an object, which includes graphite selected from the group consisting of graphite flakes, particles of exfoliated graphite, graphitic nano-structures, and combinations of one or more thereof, wherein the graphite is dispersed in a coating composition. Also included are objects to which the composition are applied, and a process for reducing the detectable cross-section of an object.

The present disclosure relates to a camouflage material for use in a snowy environment. The camouflage material includes hexagonal boron nitride (h-BN). The disclosure further relates to the use of hexagonal boron nitride for UV signature management in a camouflage material, as well as a camouflage product including such a camouflage material.

The present disclosure relates to a camouflage material for use in a snowy environment. The camouflage material includes hexagonal boron nitride (h-BN). The disclosure further relates to the use of hexagonal boron nitride for UV signature management in a camouflage material, as well as a camouflage product including such a camouflage material.

A method for producing a layer of a device for electromagnetic radiation absorption, includes: providing a ply of powder material in the layer to be produced of the device; providing a predefined concentration distribution of particles for electromagnetic radiation absorption in the layer; providing a first binder and a second binder for the powder materials, wherein the first binder includes particles for the absorption of electromagnetic radiation, wherein the second binder includes a lower concentration of identical and/or different particles than the first binder; determining a mixing ratio between the first binder and the second binder for every position in the layer; selecting a position of the layer; mixing the first and second binder according to the mixing ratio for the selected position; wetting the powder material at the selected position using the mixed first and second binders; and repeating selecting, mixing, and wetting to produce the layer.

A solar panel construction and method for making the same includes a substrate, an array of solar cells positioned atop the substrate, and a graphical film positioned atop the array of solar cells, the graphical film includes a predetermined pattern of spaced droplets of white pigment applied to a top surface of the graphical film and a predetermined pattern of droplets of colored pigment applied atop at least some of the spaced droplets of white pigment such that each droplet of colored pigment overlaps a droplet of white pigment. The construction may or may not include a separate protective film covering. In use, the white pigment functions to block a portion of the solar cells observed visually while reflecting light back to the solar cells, while the colored pigment applied atop the white pigment creates a desired visual effect such as a camouflage pattern.

A solar panel construction and method for making the same includes a substrate, an array of solar cells positioned atop the substrate, and a graphical film positioned atop the array of solar cells, the graphical film includes a predetermined pattern of spaced droplets of white pigment applied to a top surface of the graphical film and a predetermined pattern of droplets of colored pigment applied atop at least some of the spaced droplets of white pigment such that each droplet of colored pigment overlaps a droplet of white pigment. The construction may or may not include a separate protective film covering. In use, the white pigment functions to block a portion of the solar cells observed visually while reflecting light back to the solar cells, while the colored pigment applied atop the white pigment creates a desired visual effect such as a camouflage pattern.