We produced different surface area samples by carrying out surface finishing treatment after spraying Tio₂ and examined its antibacterial effects. As a result, the "as sprayed” surface area without the after-treatment increased most, and the antibacterial effects were most effective. The after- treatment which decreased the surface area of the sprayed coating was unnecessary for giving sufficient antibacterial effects in the sprayed coating of TiO₂.

In addition' after examining the antibacterial effects of the Tio₂ sprayed coating for a various range of microorganisms such as food contaminating microorganisms and food poisoning bacteria, the resulting antibacterial effects of the Tio₂ sprayed coating was sufficient enough for non-spore bacteria such as Escherichia coli o-157, Salmonella Enteritidis and Staphylococcus aureus.