PROBLEM TO BE SOLVED: To provide a method for simply and stably producing antimicrobial agent micro-particles having &le5 &mum particle diameter with a high silver content.SOLUTION: The silver halide micro-particles having &le5 &mum particle diameter with the high silver content are obtained as follows. A solution containing silver ions as A is mixed with a solution containing a halide ion in an amount of <1 equivalent to silver in the solution A as B in the presence of colloidal particles at a specific concentration of number of particles of the colloidal particles.COPYRIGHT: (C)2007,JPO&INPIT【課題】 粒径が5μm以下で高い銀含有率の抗菌剤微粒子を簡便且つ安定して製造する方法を提供する。【解決手段】 銀イオンを含む溶液をAとし、溶液A中の銀に対して1当量未満のハロゲン化物イオンを含む溶液をBとし、溶液Aと溶液Bとをコロイド粒子の存在下で、かつ特定のコロイド粒子の粒子数濃度において混合して、粒径が5μm以下で高い銀含有率のハロゲン化銀微粒子を得る。【選択図】 なし
