Photochromic complexes, its production method and skin external preparation

摘要

PURPOSE: To let the photochromic composite material exhibit excellent photochromism without imparing the usability and transparent feeling. ;CONSTITUTION: This photochromic composite material has a coated titanium dioxide layer on the surface of a thin substrate. In the above composite material, the titanium dioxide has photochromism and the size of crystallite of the titanium dioxide is 9.8-14.9nm determined by measuring the surface under a diffraction condition of a copper anticathode step angle of 0.008° and a time constant of 1 see and calculating by Sherrer's formula taking the constant K as 0.9.;COPYRIGHT: (C)1995,JPO