Can I dye my hair from black to Chestnut without bleaching it?

i think you should schedule a consult with a professional stylist. )

You see, you don’t seem to understand something here. “Dye” means to add colour to make something darker, usually fabric or leather. You do not dye hair, although some people have done it, without much success. Dye does not wash out… it is not very easy to remove.

What you should have used is a proper hair colour. Those can be removed.

Of course, since you “dyed” your hair again, you will only change your roots because that is new hair. The black will be black… that does not change.

Any time you are making something lighter, it is bleaching. There is no other way — it involves the removal of colour; therefore, it is bleaching. How much you bleach makes no difference.

But you need to remove that black first, if possible. Most blacks contain dangerous metals in them, and those will not be possible to remove, other than cutting the hair off. You will always have that stain on the hair. Seek the advice of a professional hair colourist. Explain exactly what you have done, and what you would like to have now. She may have some solution for you, whether easy or complex, I don’t know. But at least you will try — leaving it as it is now, is not really a good choice.