Goldwell Dualsenses Color Lock Serum (12 X 18ml)

UV - Ultraviolet - a specific wavelength of light invisible to the human eye

Filter - A device used to separate mixtures

Filter - An optical device to remove or enhance particular wavelengths of light.

Colour - The categorised spectrum of light visable to humans

Natural - not manmade

Prolonged - A measurement of time, generally longer than usual.

Hair - The fine strands growing on all over bodies.

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