I found them very clean under microscope and very nice smooth touch, but how about some little ozone or O3 oxy?
No, UVC does not produce ozone.
UVV light refers to ultraviolet light wavelengths near 185 nm. This wavelength does react with Oxygen to produce Ozone. The UVC light is near 260-nanometer frequency. This is long enough (with less energy) to avoid interaction with Oxygen.
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