PROBLEM TO BE SOLVED: To provide a highly stable and safe ultraviolet reflection material.SOLUTION: The invention provides an ultraviolet reflection material constituted by a polycrystalline structure which is a gathering of single crystal structures in which monodisperse colloidal particles with a particle diameter of 50-200 nm and with a CV value of 10% or less are regularly arranged.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2016,JPO&INPIT【課題】安定且つ安全性の高い紫外線反射材を提供する。【解決手段】粒径50~200nmで、10%以下のCV値を有する単分散性のコロイド粒子が規則的に配列した単一結晶構造体が集合した多結晶構造体で構成された紫外線反射材。【選択図】図3
