I would say about 6 monthes
you dont need henna to dye your hair you can use thechemical hair dye
Yes.
No you should never use lemon; it takes all the protein ouy of you hair and it can all fall out.
Yes, dyeing hair is a chemical change because the chemical composition of the hair is altered when the hair dye penetrates the hair shaft and reacts with the melanin in the hair. This change is not reversible without cutting or growing out the dyed hair.
Henna is the best and the safest natural henna to cover your gray hair. It leaves a reddish-orange tint on the hair strands after drying. However, the results depend on the natural color of your hair. Henna gradually fades out over time. It has near-permanent results on gray hair. When you have applied henna more than once, it takes really long time to fade. You have to wait till the hair grows and the color fades out.
Henna is more gentle on the hair but smells awful and offers only a limited range of colors.
no
Dyeing grey hair to red is a chemical change. The hair dye chemical reacts with the proteins in the hair to change its color permanently.
Using out-of-date natural hair henna is generally not recommended, as the potency and effectiveness can diminish over time. While henna itself can remain safe for use, its dyeing properties might be reduced, leading to less vibrant or uneven color results. Always check for any signs of mold or unusual odor before use, and consider doing a patch test to ensure it still works as intended.
No, real henna is not bad for your hair. But be careful, henna only comes in one color - reddish orange. If the product claims to dye your hair any other color, it's not pure henna - so read what else is in there. And avoid black henna at any cost. It's not henna at all, but a very nasty chemical that can be toxic. But if you want to dye your hair in the salon it can be bad. Henna contains metallic salts that react with other hair dyes. If you went to the salon and failed to mention that you use henna colours and the stylist put an ordinary colour on your hair the hair would be destroyed so don't forget to mention it in the salon.
you can die your hair with chemical based commercial brand dies though I'm not sure about naturetint in particular as I don't think they sell it here
Henna, derived from the Lawsonia inermis plant, is known for its dyeing properties, particularly for coloring hair and body art. It contains lawsone, a compound that binds to keratin in hair and skin, resulting in a reddish-brown stain. Additionally, henna has antimicrobial and anti-inflammatory properties, making it beneficial for skin health. Traditionally, it is also used for its cooling effects and to promote relaxation.