Curaprox's activated carbon toothpastes, Black is White and White is Black, offer whitening without bleaching or abrasive agents.
Swiss brand Curaprox is now offering two whitening toothpastes, Black is White and White is Black. The toothpastes contain activated carbon to remove stains instead of abrasive or bleaching agents. Black Is White is lime-flavored, while White is Black offers an extra mild taste. Both toothpastes are free of sodium lauryl sulfate (SLS), triclosan, bleaching agents, and plastic particles. Each can be used as a regular toothpaste without any limitations.
Source: Curaprox press release, 7 December 2015