Abstract: Transmissivities in ultraviolet-visible range of systems，such as different nano-oxides/dyed earth,nano-TiO₂ with different crystal forms/dyed earth and different proportional of anatase nano-TiO₂/dyed earth were studied in order to obtain the nano-oxides/dyed earth system with good UV-shielding,so that the effectiveness of color fixation and retention can been improved in the systems.Experimental results showed that adding nano-oxides with UV-shielding to dyed earth was beneficial to the color fixation;the transimissivity of the system of anatase nano-TiO₂/dyed earth was the lowest,and UV-shielding was the best when mix ratio of different nano-oxides to dyed earth kept unchanged;with nano-TiO₂ content decreased,the system′s UV-shielding behavior would be decreased,no matter the system was anatase nano-TiO₂/dyed earth or the system was anatase and rutile nano-TiO₂ mixture/dyed earth;under the certain proportion of nano-TiO₂ and dyed earth,UV-shielding behavior of different nano-TiO₂ with different crystal forms was also different in different bands.

Key words: nano-oxides, dyed earth, ultraviolet-visible range, UV-shielding ,