Most yellow dyes absorb blue light over a wide wavelength range and bring about a gradual attenuation of blue light, usually from 500 to 400 nm depending on the concentration of yellow dye used.
If a sharper cut-off of the transmission spectrum in the blue-violet region is desired, conventional yellow dyes could not provide a sharp cut-off in that region.
Due to its color changes on pH value and its intense colouring, red cabbage dye has been used as a pH indicator in pharmaceutical formulations or as a antioxidants and colorants in food systems, respectively.
Despite the“rule of the traffic light”, the bright beet pigment is not an allergen, which allows it to be removed from the list of prohibited products for HBV.
PicoSecond is the first of a new generation of aesthetic lasers that don't rely solely on heat to burn or melt away unwanted tattoo ink or melanin, the pigment that causes dark spots in your skin.
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