Vantablack is a carbon-nanotube coating engineered to trap incoming light through a dense microscopic structure. Its exceptionally low reflectance makes it useful for stray-light control, infrared systems, calibration equipment, astronomy & space technology. Surrey NanoSystems has developed spray-applied variants for complex engineering surfaces. The material also became famous in the art world after Anish Kapoor received exclusive artistic rights, triggering a dispute that encouraged alternative super-black materials. Its deeper significance lies in showing how nanoscale geometry can create powerful macroscopic optical effects.