Product description Colorless transparent Nano silver colloid is made up nano silver particle and colloid material which nontoxic, non smell, safety, no irritative and less 15nm. This colloid is transparent and no color change product, It does not dye color when it touchs skin and light clothes. Aside, the sterilization is ten times of common nano silver colloid,, it is broad spectrum sterilization. Product feature Colorless transparent, anti oxidation and no color change, antimicrobial is 50 times of mono nano silver. Quickly effective Restraining and killing colon bacillus and staphylococcus, etc.