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Unlike permanent hair color, demi-permanent color does not change your hair’s structure, texture, or color. Before we talk about demi and semi, it’s important to first understand what permanent hair color is. As the name suggests, it’s the type of color that will last the longest—it won’t wash out, it needs to actually grow out. If you have very fine or damaged, porous hair, demi permanent color may be able to fully cover your grays. If you have very light blonde hair that is porous and use a darker demi permanent dye, there is a chance you may experience some light staining on your hair after the dye washes out.
When to Use Demi Permanent Hair Color
Prepare your hair by detangling it, then divide it into four quadrants. Don’t wash your hair 48 hours before applying a demi-permanent color to prevent scalp irritation. Therefore, it will not damage your hair or change its texture when used correctly. It won’t harm or damage your hair like permanent color does and the results last a month or two (or however long it takes you to get through 24 shampoos).
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The gentle hair color with its ammonia-free formula is enriched with natural ingredients, such as coconut oil, honey, and avocado oil, to nourish and condition your hair and scalp. It also contains UV protection to help protect your hair from the sun’s damaging rays. This product is not tested on animals, making it an ideal cruelty-free option. Moreover, it is ready-to-use and comes with a detailed instruction booklet, so you can achieve the desired color results with ease. As Gibson explains, demi-permanent dye contains low levels of peroxide to allow the color to penetrate the shaft to an extent, but without ammonia. The ammonia-free formula makes it gentler on the hair than permanent dye, but less long-lasting.
Demi Permanent vs. Semi Permanent Color
This is a great option if you want to try out new colors in your hair, but don’t want to commit to a hair color for a long time. It’s also great if you need a touch up in between color appointments. Demi-permanent hair color requires a developer to activate and penetrate the hair shaft. In contrast, semi-permanent hair color is a deposit-only hair dye that coats the outside of the hair. This might sound like the same process involved when using a permanent dye.
Since the color does not change the hair significantly, demi-permanent hair color is safe for all hair types. However, if you're looking to lighten your hair, demi-permanent probably isn't the way to go. "It does a better job of darkening hair than semi-permanent [dye] does, but it doesn't lighten hair," Alvarez confirms. Ideally, a demi permanent hair color takes 20 minutes to process and impart color.
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Ramos estimates a translucent color glaze can cost anywhere from $30 to $60. Pureology's Color Fanatic Top Coat + Clear Hair Gloss ($36) is a great at-home option. Temporary hair color is usually sold in-store (versus in a salon), and prices can range from $5 to $70. Danusia (she/her) is a senior chemist in the Beauty, Health and Sustainability Lab at the Good Housekeeping Institute where she evaluates haircare, skincare, cosmetics and beauty tools. In pharmaceutical sciences with concentration in cosmetic science from the University of Cincinnati. Danusia has over 10 years of experience in the personal care industry including formulation, product development, claim evaluation and efficacy testing.
Expert-approved demipermanent hair colors
Some hair colors are chemically milder than permanent hair dyes because they do not include ammonia. However, because you should perform a patch test to know whether demi-permanent hair shades containing Para-phenylenediamine (PPD) are favorable for your scalp and strands or not. It’s best suggested to go for dermatologist-tested or allergy-tested formulas for the same. This demi-permanent hair color is aimed at dark-haired beauties who want to revive their natural hair color.
Temporary and permanent dyes are popular alternatives when playing around with hair color. However, semi-permanent hair dye washes off too soon, while permanent hair color requires more maintenance and long-term commitment. So, if you want a hair color that’s easier to maintain and doesn’t wash off demi-permanent hair dyes come into play. This demi-permanent hair color is a perfect choice for covering those gray strands.
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Demipermanent hair color is like semipermanent dye’s cousin that has a bit more staying power. Plus, demipermanent dyes don’t contain ammonia, so they won’t damage or permanently alter your hair the way a permanent dye will. You must select demi-permanent hair colors that are cruelty-free, and also fade-resistant. You should avoid hair colors that contain harmful chemicals to protect your hair from damage and allergic reactions.
Higher-volume developers force the cuticle layer to open up and allow the dye molecules to penetrate deep into the hair. The permanent color process is damaging, even for healthy, virgin hair. Permanent hair color is a lot more damaging on hair than demi permanent thanks to the ammonia in the dye and the higher-volume developers used with it. When you use demi permanent dye, you must choose a color that is either the same depth (color level) as your current hair color or one that is darker. Below, find a few reasons it may be worth opting for a demi-permanent hair color over other types of hair dye.
That being said, if you already have very dark hair, you’re definitely limited in what you can do with demipermanent color. Demi-permanent hair color is ammonia-free, so its color molecules get under the outer cuticle of the hair shaft but, unlike permanent dye, doesn’t penetrate the strand. Instead, they wrap around the hair’s cuticle, creating a coating of color that’s gradually washed away.
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