What is the difference between demi and semi color

Semi-permanent color can also counteract yellowing blonde hair, keep red from fading-usually the first hue to lose its punch — and prevent brunette from turning red or brassy. Wondering how to get rid of brassy hair? Your colorist can add semi-permanent color to a masque or conditioner to create a custom toner to use between salon visits.

Permanent hair color involves a process where ammonia and hydrogen peroxide work together to lift the hair cuticle to change the structure of the melanin and keratin, the elements responsible for hair color and texture, respectively, in order to deposit dye.

Permanent hair color can lighten, darken, or alter the tone and will last up to 8 weeks, though root touch-ups may be required monthly.

Permanent color can offer full coverage of grays. Your choice of cleanser and how often you prefer to wash is key to determining how long your color will last. We have many tips for dyed hair including washing less frequently or choosing a detergent-free formula that will help you get more brilliance for your buck. First of all, there's the question of choosing the right hair color. But beyond that, there's also the uncertainty over what kind of hair dye you should use.

For instance, what is the difference between "semi permanent" and "demi permanent" hair color, anyway? You've probably come across these terms on your hair dye boxes — and you may have even thought they were interchangeable. Although both are hair colors that don't contain ammonia, and are therefore not permanent and gradually wash out over time, that's where their similarities end via L'Oreal. Demi-permanent hair dye, like semi-permanent hair dye, is a hair colour that contains no ammonia, hence they are not permanent in the hair and gradually wash out over time.

Both options provide a healthy, gentle alternative for dyeing hair, as they are less damaging than permanent hair dye can be. Demi-permanent hair dye contains some peroxide to develop the hair, while semi-permanent hair colour does not. The peroxide within demi-permanent hair colour opens the hair cuticle ever-so-slightly, allowing the dye to penetrate the hair.

This allows the colour to last longer and can result in a more dramatic change than semi-permanent hair colour, which is applied to the outside of the hair cuticle. Demi-permanent hair dye is especially fantastic for going darker or covering greys, while semi-permanent hair colour is better for minimal greys or those just wanting a colour boost.

Add a weekly hydrating hair mask or treatment for extra points! There are still some great options that contain ingredients to balance out the dye and keep the hair in tip-top condition.