In order to match the reflectance profile of the greenish leaf at NIR region, four commercially available vat dyes were used to dye cotton fabrics. The reflectance of dyed fabric and the transmittance of dye liquor in alcohol solution were measured by using U-4100 spectrometer with an integrating sphere. The effects of the combination dyeing, dyeing concentration (% owf) and fabric weaves on the reflectance were also studied. The results show that the reflectance of the combination dyeing is determined by one of the dyes whose reflectance curve emerges at longer wavelengths. Vat Blue 13 plays an important role in green camouflaging. When the dyeing concentration of vat blue 13 is 1–2% owf, the reflectance of the dyed fabric almost overlaps that of greenish leaf in red shift region (region A). Fabric weave has a little effect on the reflectance for the same dyeing program.

A layer of TiO₂ nanoparticle was immobilized on PET fiber using titanium sulfate and urea under hydrothermal condition. The TiO₂-loaded fiber was characterized by scanning electron microscopy, X-ray diffraction, infrared spectroscopy, thermal gravimetry and differential scanning calorimetry analysis, respectively. PET fabric before and after treatment was also examined for the reflectance spectrum, tensile properties, water absorption and degradation of methyl orange dye under UV irradiation. The results show that pure anatase nanocrystalline TiO₂ is precipitated in the presence of PET fabric and deposited on the surface of fiber via the hydrothermal process. The thin film is constituted of sphere nanoparticles of an average size 3.0 nm, which is grafted onto the fiber surface by chemical reaction. For the TiO₂-coated fiber, the onset decomposition temperature decreases, but the exothermic temperature increases as compared with the untreated fiber. Owing to the shrinkage of fabric size, the breaking load and tensile strain in warp and weft directions increase. The TiO₂-loaded PET fabric can absorb more ultraviolet radiation even after being washed for 30 times. The water absorbency is also slightly increased. The capability of photocatalytic degradation of methyl orange dye is obtained.