* Unpredictable results: The semi-permanent color may affect how the permanent color takes. The results could be uneven, blotchy, or even a completely different color than you intended.
* Damage: Permanent hair color is more harsh than semi-permanent and can potentially damage your hair, especially if it's already been treated with semi-permanent color.
* Color build-up: If you apply permanent color over semi-permanent color, you risk creating a buildup of color on your hair, making it difficult to remove later.
What to do instead:
1. Remove the semi-permanent color: Wash your hair with a clarifying shampoo a few times to remove the semi-permanent color as much as possible. You can also use a color remover if needed.
2. Wait a few days: Allow your hair to rest for a few days after removing the semi-permanent color. This will help your hair regain its natural balance.
3. Apply permanent color: Once your hair is clean and free of semi-permanent color, you can apply the permanent hair color as usual.
Important Note: If you're unsure about applying permanent color on your hair, it's always best to consult with a professional hairstylist. They can advise you on the best course of action and help you achieve your desired hair color safely.