Dying black point

Sound about right. Though, the dyes we mostly use are direct dyes rather than box dyes with peroxide.

When you say, "Can you also discuss about using natural ingredient as dying component ?", can you elaborate? I'm not totally sure what you're asking.

Thanks for your reply.
Well I imagine, but it may be completely false, that hair dyes are composed of chemical ingredients.
I don't know if exists on the market kind of "green" dyes made only from natural components like plants, fruits or mushrooms... I know that mealy bugs were used to dye garments in red in the past. Now it has been replaced by chemicals... Just wondering if such "natural" dyes exist today on the hair dye market and if it works fine.
Thanks

Well, to be pedantic, all things are made from chemicals.

There is henna. But most dyes that are "natural", including henna, will have synthetic ingredients to help them work more effectively, to keep them from going bad etc. You just don't get much colour payoff from most traditional dying products.

"Natural" is always more of a word that is there to convince people to buy a product, and it works. There's plenty of products that use the words natural, organic, "free from", etc, but they still use synthetic chemicals.