Avoid heat styling: Using hot tools, such as hair dryers, curling irons, and straighteners, can cause the color to fade faster. Touch up your roots: The dye will gradually fade from your roots as your hair grows. Every few weeks, you can touch up your roots with a semi-permanent dye to prolong the color.
Sulfates, paraben's, hot tools, sunlight, washing your hair too much, and using hot water or warm water for rinsing can all cause it to fade. If doesn't matter whether the dye is semi, demi, or actually permanent. All of those will cause it to fade.
Brightly colored hair dyes tend to fade quickly due to several factors: Chemical Composition: Many bright hair dyes, especially semi-permanent and temporary dyes, contain larger pigment molecules that do not penetrate the hair shaft as deeply as darker dyes. This means they are more prone to washing out.
Keep it cool. To keep your new hair colour vivid and bright, we recommend washing your hair with cold water (as cold as is bearable). Cold water keeps the hair cuticles closed and therefore stops the colour running out and fading too soon. Warm water is the enemy!
So, how long does semi-permanent hair colour last? It really all comes down to its formula. With some brands, you can expect them to last anywhere from 6 – 8 washes, but with products like L'Oréal Paris Casting Crème Gloss, you can enjoy your new colour for up to 28 shampoos.
It would help if you avoided shampoos and conditioners that preserve colour or add pigment to the hair, as this could reverse your progress. Use Warm Water – Using warm water will open the hair follicles and is guaranteed to speed up the fading process.
Time and Patience: Sometimes, the best way to remove semi permanent hair colour is simply to wait it out. As you shampoo and wash your hair over time, the colour will gradually fade on its own. It might take a bit longer, but it's a gentle approach that won't cause any damage to your locks.
Avoid heat styling
Heat styling also opens the cuticle of the hair, allowing color to fade. If you do heat style your hair, make sure you prep with a heat protectant product.
A common pitfall that many people fall into, and should be avoided is shampooing after applying semi-permanent hair color. Following your initial application of semi-permanent hair color, it is important to not shampoo your hair.
Hair gloss or semi-permanent and demi-permanent hair dye that typically fades away after four to twelve washes are going to be easier to remove than a permanent dye. The same applies to temporary root touch-up sprays and color sprays: those wash out when you shampoo your hair.
If your hair floats, it has low porosity, which means it will have a more difficult time both taking in and holding onto color. If your hair sinks, it has high porosity, which means it will take color but may not hold onto it too long.
“A big trick is always using hot water when you shower, because it's opening up the cuticle and getting that dye to fade quicker,” she says. “Most brands and professionals will recommend cold water to keep the color vibrant, but for fading definitely use warm [or] hot water.”
Apply the semi-permanent hair color on dry or damp hair. Towel-dried hair will allow it to soak up the color better. Spread the color evenly onto the desired areas. Make sure that you carefully follow all the directions of the application as mentioned in the instructions.
Hot Water and Frequent Washing:
Simply washing your hair frequently with hot water can help fade the colour over time. This is the least damaging method but requires patience as the results are gradual. Washing your hair more often can significantly speed up the colour-removal process.
Pick a lighter hair colour
A lighter colour will then look better. Your hair follicles produce less pigment as you're turning older. If there's no more pigment being produced in the hair follicles, your hair turns pigmentless.
All you need to know is washing your hair in lukewarm, cool, or even cold water is the most effective way to keep hair dye from fading. Luckily, this is only true while you're actively rinsing your hair.
A semi-permanent color generally fades over time, usually after four to twelve washes. However, it is unlikely that the color will completely wash out, especially if you have used a darker shade. If your hair has been dyed for a long time or if it is porous, some color pigments may remain.
Salons use semi-permanent color to add depth to your color, grow out permanent color, or add gloss and shine to your strands. “It can even create a highlighted look, depending on the hair and the shade selected,” Shade says.