What is the difference between semi and demi

Chris Greene: Semi permanent hair color is a type of hair color that contains no ammonia and deposits only. This type of color usually lasts between 5 to 12 washes. Chris Greene: Ideal candidates would be anyone looking to blend grays, refresh their existing color, tone highlights, or for corrective color because it is a little stronger then a semi-permanent color. Mauricio Bermudez: Semi is ideally for everyone who wants to maintain their hair color in between color visits. Semi permanent color is also ideal for individuals who have pink, purple, blue, and any other color in the rainbow.

I create custom semi permanent color masques for clients who require lots of maintenance in between 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.

Sources: 1. L'Oreal Paris. Accessed October 7, 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.

If you're unsure about which hair dye to use, here's the true difference between semi permanent and demi permanent hair color. According to the haircare brand Clairol Professional , the major difference between semi and demi permanent hair color lies in the permanency: While demi permanent hair color can last up to 24 shampoos , semi permanent hair color typically lasts from four to 12 washes. Semi-permanent color is also commonly referred to as a stain, gloss , or a toner.