To provide an ultraviolet ray- and near-infrared light-shielding dispersion and an ultraviolet ray- and near-infrared light-shielding item that have a near-infrared light transmittance lower than their visible light transmittance, exhibits ultraviolet rays-absorbing performances, control the visible light transmittance, and can develop a designable and practical bronze color having a low saturation.
The ultraviolet ray- and near-infrared light-shielding dispersion comprises a medium and, mixedly dispersed therein, a composite tungsten oxide fine particle represented by general formula: MYWOZ (wherein 0.001Y1.0; 2.2Z3.0; and the element M is at least one selected from among Cs, Rb, K, Tl, In, Ba, Li, Ca, Sr, Fe and Sn) and an iron oxide fine particle, where the dispersion has the mixing ratio, by solid contents weight, of the composite tungsten oxide fine particle to the iron oxide fine particle within the range from (0.05:1) to (10:1) and the value of the near-infrared light transmittance smaller than the value of the visible light transmittance and, when evaluated in the L*a*b* color system, has L* of 45 to 95, a* of -20 to 90 and b* of 0 to 180.
ADACHI KENJI
| JP2008194563A | 2008-08-28 | |||
| JP2008044609A | 2008-02-28 | |||
| JP4666226B2 | 2011-04-06 |
Toru Yui
Hitoshi Kiyono