There are two types of hair dyes: permanent and semi-permanent, with variations of each.
A) Permanent Tints: Must be mixed with hydrogen peroxide to lift hair colour. The peroxide opens the hair cuticle so that the tint can penetrate the cortex and form the colour. The higher the level of peroxide, the quicker and lighter the result.
B) Semi-Permanent Colours: They don't actually lift the colour - you can either vary the tone within your natural highlights or go darker. Quasi-colour contains ethanolamine and 3% peroxide, which slightly opens the cuticle. This means that the colour can last up to 20 washes and will softly fade as you shampoo, causing no re-growth problem.
C) Semi-Permanent Vegetable Colours: Contain only vegetable extracts and natural ingredients, so no colour is stripped from your hair. It is similar to henna but it doesn't coat the hair (adds shine though). This colour sits on the hair's surface and will wash out after about 8 shampoos.
Points to consider:
Skin Tone: Your new hair colour should complement your skin tone. Light-skinned people don't look good with very dark hair because it draws colour out of their skin. Dark, tanned skin doesn't look great when mixed with a one-tone blonde, but four or five blonde, chestnut or honey tones look fabulous. Hairstyles: Different colouring methods suit different hairstyles, so get some expert advice when deciding which one to go for.
Hair Colours
BLACK:
This is by far the easiest colour to accomplish because the molecules in black tints are larger and will cover all hair types very effectively. Caution is needed when using black, as it only tends to look good on people with darker and olive skin tones.
BROWN:
Brunette is always a safe choice as it suits nearly every girl in town. Varying the shade with highlights can achieve a huge range of looks. From chocolate brown and bronze shades to honey or dark blonde, combinations of natural tones gives incredible shine as darker-pigmented tints add condition to your hair.
RED:
Red is the ultimate sexy shade, for colour that cries out for attention. Hair holds on to red-toned pigments well, so going copper-top can be easy for most people. But be warned - if you are blonde you will usually have to go two or three shades darker than your natural colour to achieve a rich red (brunette), and it's not easy to reverse it.
BLONDE:
If you would love to be blonde, talk the process through with your hair stylist before you go for it. It should be relatively painless on virgin dark brown hair, but if your hair has been permanently tinted then the process will become a long saga. Never attempt this kind of dye job on your own for the first time.
