L’Oreal’s latest gadget makes hair coloring a mess: gadgets

The upper part of Colorsonic has a nozzle with bristles, while the lower part stores an ink cartridge containing a “precise mixture of developer and formula”. The working principle of the device is to distribute the correct amount of hair color, and then the bristles swing at a specific angle more than 300 times per minute to evenly spread the color.

(L’Oreal stated that those with darker hair still need to be bleached beforehand; Colorsonic only handles the dyeing process.)

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