wherein the dispersoid is an organic particle, an inorganic particle or a mixture thereof,

the dispersion medium is a non-aqueous dispersion medium in a solid state at room temperature,

the solid dispersion does not comprise any dispersant or surfactant,

the inorganic particle is selected from the group consisting of iron, aluminum, chromium, nickel, cobalt, zinc, tungsten, indium, tin, palladium, zirconium, titanium, copper, silver, gold, platinum, kaolin, clay, talc, mica, bentonite, dolomite, calcium silicate, magnesium silicate, asbestos, calcium carbonate, magnesium carbonate, barium carbonate, calcium sulfate, barium sulfate, aluminum sulfate, aluminum hydroxide, iron hydroxide, aluminum silicate, zirconium oxide, magnesium oxide, aluminum oxide, titanium oxide, iron oxide, zinc oxide, antimony trioxide, indium oxide, indium tin oxide, silicon carbide, silicon nitride, boron nitride, barium titanate, diatomite, carbon black, graphite, rock wool, glass wool, glass fiber, graphene, carbon fiber, carbon nanofibers, carbon nanotubes, an alloy of two or more metals of them or a mixture of two or more of them,

the organic particle is selected from the group consisting of azo-based compounds, diazo-based compounds, condensed azo-based compounds, thioindigo-based compounds, indanthrone-based compounds, quinacridone-based compounds, anthraquinone-based compounds, benzimidazolone-based compounds, perylene-based compounds, phthalocyanine-based compounds, anthrapyridine-based compounds, dioxazine-based compounds, polyethylene resin, polypropylene resin, polyester resin, nylon resin, polyamide resin, aramid resin, acrylic resin, vinylon resin, urethane resin, melamine resin, polystyrene resin, polylactic acid, acetate fiber, cellulose, lignin, chitin, chitosan, starch, polyacetal, polycarbonate, polyphenylene ether, polyether ether ketone, polyether ketone, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polysulfone, polyphenylene sulfide, polyimide or mixtures thereof, and

the dispersion medium is one or more selected from the group consisting of polyether polyols, polyester polyols, hydrogenated sugars, alkane diols, phenol-based compounds, imidazole-based compounds, acid anhydride-based compounds, anhydrosugar alcohols or combinations thereof.