Semi-permanent hair dyes

Semi-permanent dyes are great if you want to change your hair color without the commitment of permanent hair dye. The formula for semi-permanent dyes lasts up to eight weeks, but will fade over time. This means that you can get a variety of different colors without having to worry about them being permanent.

Semi-permanent dyes do not contain ammonia or peroxide like permanent hair dyes do, which is why they often have a better smell than other types of temporary coloring options.

Demi-Permanent Hair Dyes

Demi-permanent hair dyes, on the other hand, are a semi-permanent solution that lasts longer than semi-permanent dye. Demi-permanent dyes do not penetrate the hair shaft as deeply as permanent dye does and therefore is less damaging to your hair. If you’re looking for something that will give your locks an interesting hue but don’t want to commit to anything too permanent, this type of product may be right up your alley.

Both are great options, it just depends on whether you want to keep your color for a few months or want to stick with it for a year.

Semi-permanent hair dyes are very much like the demi-permanent dyes, except they last a little longer. They’ll sit in your hair for 8-10 shampoos and will wash out completely when you use shampoo to remove them. This is great if you want to keep your hair color for a few months longer than regular dye would last. However, it does have one drawback: it won’t cover gray hairs as well as demi-permanent dyes because it doesn’t have ammonia in its formula.

Demi-permanent dye lasts about three months before washing out from your scalp entirely. This means that after using this type of dye once or twice, you’ll be able to go back to using normal shampoos without worrying about fading or staining your skin! Additionally, this option has been shown to cover greys better than semi-permanent options because of its higher ammonia content; however it may still fade faster than other types of coloring methods due to its lower concentration of peroxide compared with other products on the market today.”