Why Does Hair Colour Fade?
You just left the salon with vibrant, head-turning colour — but after a few washes, you notice the intensity already starting to slip. This is completely normal, but you can slow it down dramatically once you understand what's happening inside the hair strand.
Hair colour works by lifting the cuticle scales to deposit pigments into the cortex. Once the process is complete, those scales need to close back down to lock the colour in. The problem? Everyday factors keep prying those scales open, releasing pigments little by little.
The main culprits behind colour loss include:
- Hot water — it swells the cuticle and accelerates pigment washout
- UV rays — sunlight breaks down colour molecules, especially copper and red tones
- Harsh shampoos — aggressive sulfates strip colour with every wash
- Chlorine and hard water — they oxidize pigments and dull your colour
- Heat tools — flat irons and blow dryers at high temperatures weaken colour-treated hair
Understanding these mechanisms is the first step toward building an effective colour-care routine. The good news? Every single one of these factors can be managed with the right habits and the right products.
Essential Habits After Colouring
The first 48 hours after colouring are critical. This is when pigments fully bond within the hair fibre. Here are the key steps to make your colour last as long as possible.
Wait Before Your First Wash
Ideally, avoid washing your hair for 48 to 72 hours after colouring. This gives the pigments time to set and allows the cuticle scales to seal completely. If you absolutely need to refresh your hair, a quick rinse with lukewarm water — no shampoo — will do the trick.
Rinse With Cool or Lukewarm Water
Make it a habit to finish every wash with a blast of cool water. This simple step closes the cuticle and seals colour inside the hair fibre. You'll also notice your hair looks shinier and smoother.
Space Out Your Washes
Every wash carries away a small amount of pigment. By limiting your shampoos to two or three times a week, you significantly extend the life of your colour. Between washes, a quality dry shampoo can help keep your style looking fresh.
Protect Your Hair From Heat
Before reaching for a flat iron, curling iron, or blow dryer, always apply a heat protectant. Keep your tools at a moderate temperature — ideally below 180 °C (356 °F) — to preserve both your colour and the integrity of the hair fibre.
These daily habits form the foundation of a long-lasting colour. Paired with the right products, they can easily double the life of your colour between salon visits.
Choosing the Right Shampoo for Colour-Treated Hair
Your shampoo choice is arguably the single most important decision for colour maintenance. The wrong shampoo can ruin a fresh colour in just a few washes, while the right one will keep it looking salon-fresh for weeks.
What to Avoid
Shampoos containing harsh sulfates (sodium lauryl sulfate, sodium laureth sulfate) are the number-one enemy of colour-treated hair. These powerful cleansing agents strip colour with every use. Also steer clear of formulas high in alcohol, which dry out the fibre and dull your reflections.
What to Look For
Choose shampoos specifically formulated for colour-treated hair. These products typically contain:
- Gentle cleansing agents that respect the colour
- Antioxidants that protect pigments from oxidation
- Moisturizing ingredients that maintain the fibre's natural shine
- A slightly acidic pH that encourages the cuticle to stay sealed
The Case of Red and Copper Tones
Red and copper shades are notoriously difficult to maintain because their pigment molecules are smaller and escape from the hair fibre more easily. If you wear these tones, a shampoo specially designed to neutralize unwanted undertones and revive warm hues becomes essential. The No Rouge line from Luc Vincent was developed precisely to address this challenge.
You can also check out our complete guide to colouring your hair at home for a deeper look at how product choices influence your final result.
Treatments That Extend Your Colour's Life
Beyond your everyday shampoo, targeted treatments can make a real difference in how long your colour stays vibrant. Work them into your routine for a colour that truly lasts.
Hair Masks for Colour-Treated Hair
A hydrating mask once or twice a week helps restore the hair's protective barrier. Look for formulas enriched with keratin, natural oils, or proteins that strengthen the fibre without weighing it down. Apply the mask to your lengths and ends — that's where colour tends to fade first.
Leave-In Treatments
Leave-in serums and creams form a protective film around the hair fibre. This invisible shield guards your colour against daily aggressors — pollution, wind, friction — while adding brilliant shine. Apply a small amount to damp hair before styling.
Sun Protection for Your Hair
We always remember to protect our skin from the sun, but rarely think about our hair. UV rays break down colour pigments fast, especially during the summer months. A protective spray with UV filters is a smart investment for anyone who wants to keep their colour vibrant through the warm season.
Reconstructing Treatments
Even gentle colouring puts stress on the hair's internal structure. Reconstructing treatments help repair the disulfide bonds damaged during the chemical process. The Recréer line from Luc Vincent is specially designed to rebuild hair fibre weakened by chemical treatments, helping colour hold better in healthier, stronger hair.
When Should You Recolour?
The ideal frequency for touching up your colour depends on several factors: the type of colour, your natural shade, how fast your hair grows, and the quality of your maintenance routine.
Permanent Colour
Root touch-ups are generally needed every four to six weeks. However, with a solid colour-care routine, you can often stretch that interval to eight weeks without a noticeable line of demarcation. Techniques like balayage and ombré allow for more natural grow-out and less frequent touch-ups.
Semi-Permanent Colour
These colours fade gradually over six to twelve washes. Their advantage is that they don't create a harsh root line. They're perfect for refreshing an existing shade or experimenting with a new tone without long-term commitment.
Signs It's Time for a Touch-Up
Watch for these indicators to know when the moment is right:
- Roots are visible beyond one centimetre
- Your colour has lost its vibrancy despite consistent care
- Unwanted undertones are emerging (coppery or yellowish tones)
- Your hair looks dull and lifeless