Disclosed a method of preparing composite particles comprising a non-porous spherical particulate inorganic material deposited on a plate-like inorganic material, where refractive index of said particulate inorganic material is greater than that of said plate-like inorganic particulate material, wherein, said spherical material occupies 20 to 80 % of total surface area of said plate-like material and wherein the amount of said spherical material accounts for 2 to 20 wt% of said composite particles, further wherein said plate-like inorganic material is mica and said non-porous spherical particulate inorganic material is silicone dioxide, said method comprising the steps of: (iv) silanization of said plate-like inorganic material to get a silanized material having functional groups "A"； (v) silanization of said non-porous spherical particulate inorganic material to get a silanized material having functional groups "B", where A ≠ B； and where said "A" and said "B" are capable of reacting with each other such that by way of their reaction, said non-porous spherical particulate inorganic material deposits on said plate-like inorganic material； and, (vi) reacting said silanized material having functional groups "A" with said silanized material having functional groups "B".L'invention concerne un procédé de préparation de particules composites comprenant un matériau inorganique particulaire sphérique non-poreux déposé sur un matériau inorganique de type plaque, l'indice de réfraction dudit matériau inorganique particulaire étant supérieur à celui dudit matériau particulaire inorganique de type plaque, ledit matériau sphérique occupant 20 à 80 % de la surface totale dudit matériau de type plaque, et la quantité dudit matériau sphérique représentant 2 à 20 % en poids desdites particules composites, en outre, ledit matériau inorganique de type plaque étant du mica et ledit matériau inorganique particulaire sphérique non-poreux étant du dioxyde de silicium, ledit procédé compr
