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.
no it is a color dye added to the dead cells that are your 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
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
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.
Natural Henna is made from the leaves of the henna plant. They are ground up and mixed to a paste with a liquid, be it lemon juice, coffee or tea or bottled water. If the quality is good enough it can be used for body art, if it`s not that high, it can still be used for dyeing nails and hair. The colour on the skin can vary from a reddish brown tone to a cherry black depending on which body part you put it on, how long you left the paste on, how well you follow the aftercare instructions and where the powder was harvested. If you want to determine the resulting colour on your hair, you need to factor in your natural hair colour and look for recipes that will give you the colour you`re looking for. There are plenty of mixing options for henna for hair and a lot of tones can be achieved from red to brown. Even black is possible if you dye with Henna first and then follow up dyeing with Indigo. Sadly you can find a lot of products online that are called henna but really are not, it`s mostly chemicals with little or no henna at all. If you`re interested in buying henna powder or paste, buy from a reputable henna artist in your area and ask them any questions you might have.
Cutting hair and shampooing hair are purely physical changes. However curling or straightening hair involve chemical changes too (i.e. sulfur crosslinks move). Dyeing hair is also chemical.
Yes henna can be applied to hair that has been relaxed. Just be sure that you are using real pure henna as some store henna has been altered and are not pure.