RGF utilizes photoionization, ozone, super oxide ions, UV light rays and hydroxyl radicals. Hydroxyl radicals, ozone, hydrogen peroxide, oxygen and UV rays. See the Electromagnetic Spectrum below. The food is not irradiated with penetrating radiation. As such, it does not have to be labeled with the radiation symbol.
Food irradiation utilizes penetrating radiation, which sanitizes throughout the meat or poultry.
Food photoionization basically provides the same level of sanitation for the food surface. It is not penetrating. However, most microbial or bacterial contamination is on the surface. This is performed by forcing ozone to react via a free radical pathway. Many molecules that are resistant to ozone alone are degraded by this free radical process.