Interference pigments based on SiO.sub.2 flakes coated with crystallites of alpha-Fe.sub.2O.sub.3. Also, a process for the preparation of interference pigments that comprise SiO.sub.2 flakes coated with a crystallite of alpha-Fe.sub.2O.sub.3, by a wet-chemical process in a fluidised bed, by a CVD process, by a PVD process, or by any combination of said processes. Also, the use of interference pigments based on SiO.sub.2 flakes coated with crystallites of alpha-Fe.sub.2O.sub.3, in particular in paints, coatings, industrial and automobile paints, ceramic materials, plastics and cosmetic formulations.

An embodiment of the present application discloses a display panel, a manufacturing method thereof, and a display device thereof. The display panel includes a light emission functional layer and a color filter layer, the color filter layer includes a light shielding units, a light shielding material in the light shielding units includes a light shielding composition. The light shielding composition includes a plurality of carbon black particles and at least one function group located on surfaces of the carbon black particles. The function group is an acidic functional group or a free radical capture group, the acidic functional group is one of a carboxyl group, a hydroxy group, and a carbonyl group. The free radical capture group is a ketone group.

The present invention is directed to effect pigments with solvochromic properties. These effect pigments have a structure comprising a substrate in platelet form and a coating applied to the substrate, wherein the coating comprises: optionally a layer (1) comprising or consisting of at least one of tin oxide, tin hydroxide and/or tin oxide hydrate, a layer (2) comprising at least one of metal oxide, metal hydroxide and/or metal oxide hydrate, and a layer (3) comprising at least one of metal oxide, metal hydroxide and/or metal oxide hydrate, wherein the layers (2) and (3) comprise in their metal oxide, metal hydroxide and/or metal oxide hydrate in a majority two different metal ions from the group consisting of Ti, Fe, Sn or Zr and a further spacer layer (4) being located in between layers (2) and (3), wherein layer (4) has a porous structure comprising cavities and connectors. The solvochromic properties denote to the effect pigment having a first interference color under ambient atmosphere which changes reversibly to a second interference color, when the effect pigment comes into contact with a solvent.

There is disclosed a method including chemically converting a first material of a lamellar particle into a compound of the first material. The step of chemical conversion can be performed by a reactant, and the reactant can be in a form of at least one of a solid state, a liquid state, a vapor state, and a plasma state.