Permanent hair colour, while called "permanent," isn't actually permanent in the sense that it never fades or changes. It's more accurate to say it's long-lasting until the hair grows out or it's recoloured.
Here's a breakdown:
Understanding "Permanent" Hair Colour
The term "permanent" refers to how the dye works. It chemically alters the hair shaft, making the colour last much longer than temporary or semi-permanent dyes. However, the colour will fade over time due to several factors.
Factors Affecting Colour Longevity
According to the reference, permanent hair colour:
- Technically lasts until the hair grows out or is recoloured.
- Can fade over time.
- Fading might become noticeable between 6 to 12 weeks.
- Longevity depends on hair type and specific product used.
Detailed Explanation:
Essentially, while the dye doesn't wash out completely, its vibrancy will diminish. The initial colour you achieve might be slightly different as it fades. This is because the initial colour is achieved through a chemical reaction, whereas fading is a process where pigment particles break down and are gradually lost.
Why Fading Occurs:
Several external factors influence how quickly hair colour fades, including:
- Sun Exposure: UV rays can break down colour pigments.
- Washing Frequency: Frequent shampooing, especially with harsh products, can accelerate fading.
- Heat Styling: Using heat tools like hair dryers and straighteners can cause the colour to fade faster.
- Water Quality: Hard water can affect colour vibrancy.
How To Maintain Hair Colour:
You can extend the vibrancy of your hair colour with these tips:
- Use colour-safe shampoo and conditioner.
- Wash hair less frequently.
- Use heat protectant sprays before styling with heat.
- Avoid direct sun exposure.
- Use deep conditioning treatments to maintain hair health.
Conclusion
In conclusion, while permanent hair colour does penetrate the hair shaft for long-lasting colour, it is not truly permanent in that it will not last forever without fading. It lasts until the hair grows out or it is recoloured, with noticeable fading potentially occurring in 6-12 weeks. The exact duration depends on several factors, including the hair type and products used.
