Shiro (white) shampoo has char essence as its main ingredient. The charcoal essence is a byproduct of the Kishu Binchotan production, is disinfectant and also adds the characteristic smoky aroma, which is the Sort of Coal signature scent.
Rules of a Creator’s Life: Do more than what you're told to do. Try new things. Make work into play. Work when others are resting. Always be creating. Make your own inspiration. Love what you do, or leave.