Ecofriendly Camouflage Textiles with Natural Sand-based Silicon Dioxide against Simultaneous Combat Backgrounds of Woodland, Desertland, Rockland, Concreteland and Water/Marine

Abstract Natural sand-based silicon dioxide (NSSD) is a common material of multidimensional combat backgrounds (CBs) such as dry leaves/wood, green leaves, tree bark-woodland CB; water-marine CB; sand-desertland CB; rock-rockland CB and concrete-concreteland CB. NSSD was coated, printed and padded on polyamide-6,6 (PA-6,6) and cotton fabric for design of camouflage textiles. The camouflage properties of coated, printed and padded fabric in visible (Vis) wavelength, 400-700 nm were investigated by International Commission on Illumination (CIE)-color value (L*, a*, b*), Kubelka-Munk (K-M) reflection, reflection (%) and color rendering techniques of color measurement spectrophotometer. The structural properties versus electron imaging were examined by scanning electron microscopy. Field trialling of NSSD treated camouflage textiles was investigated by Vis imaging under natural illumination, sunlight. The adaptive properties for CIE-chromatic appearance (red, green, blue, L*, a*, b*) and grey value (0-255) of NSSD formulated fabric were analyzed by ImageJ software. This optical assessment of ecofriendly approach of NSSD-camouflage material relates to camouflage signature management for defence threat protection against five-dimensional combat background such as desertland, woodland, rockland, concreteland and water/marine.