Solid Products with Improved Stability and Method for Producing the Same

摘要

An object of the present invention is to provide solid products excellent in storage stability such as photostability and a method for producing the solid products. The solid products comprising: intermediate products including a core part comprising an active substance, and a core-coating layer covering the core part and comprising a powder-coating agent; and a film covering the intermediate products and comprising a compound having a photocatalytic activity or a semiconducting property are provided. The method for producing the solid products which comprises the step of coating a core part comprising an active substance with constituent components of a core-coating layer comprising a powder-coating agent by a powder coating method is provided.