Yes, you can leave toner on for 10 minutes. The ideal time to leave toner in depends on several factors, such as your hair's quality, shade, and desired effect. For a semi-permanent toner, you can typically leave it on for 5-20 minutes. Some salon professionals leave toner on for 7-10 minutes, especially for darker blonde hair. For white hair, you should leave the toner on for at least 5-10 minutes.
Keep in mind that the longer you leave the toner in, the darker the result will be. If you are going for a lighter shade, you may want to leave it on for a shorter amount of time.
Here are some additional tips for using hair toner:
- Use a toner with an acidic pH to help protect your hair.
- Always follow the instructions on the product label.
- Test the toner on a small strand of hair before applying it to your entire head.
- Wash your hair with a clarifying shampoo before applying toner.
- Condition your hair after using toner.
