As a hair care specialist with years of experience in the industry, I understand the importance of using the right techniques and products for hair care, especially when it comes to chemical treatments like relaxers. Relaxers are designed to alter the structure of your hair to make it straighter and more manageable, but they can also be quite damaging if not used correctly.

The duration you should leave a relaxer in your hair is a critical factor that can affect the outcome of the treatment. The instructions on relaxer products often suggest application times of 13, 15, or 18 minutes, depending on the coarseness or resistance of your hair. However, these are just starting points and may not be suitable for everyone.

If you have fine to medium hair, as you mentioned, it's generally less resistant to chemical treatments, which means it may not require the full time suggested by the product instructions. Over-processing can lead to hair damage, such as breakage and excessive dryness. On the other hand, under-processing may result in a less than desirable straightening effect.

In your case, you've mentioned that you leave the relaxer in for 21-25 minutes. This is a longer duration than what's typically recommended, and it's important to monitor your hair closely during this time. Over time, the relaxer can cause significant damage if it's left on longer than necessary. It's crucial to perform a strand test before applying the relaxer to your entire head. A strand test involves applying the relaxer to a small, inconspicuous section of hair and checking the results after the recommended time. This will give you an idea of how your hair reacts to the product and help you determine the appropriate processing time.

Additionally, it's essential to consider the condition of your hair before using a relaxer. If your hair is already damaged or dry, it may not be able to handle the relaxer as well, and a shorter application time may be necessary. Regularly deep conditioning and moisturizing your hair can help to prepare it for chemical treatments and minimize damage.

Remember, everyone's hair is unique, and what works for one person may not work for another. It's always best to consult with a professional hairstylist or a trichologist if you're unsure about the right approach for your hair type and condition. They can provide personalized advice and ensure that you're using the correct products and techniques for your hair.

In conclusion, while the instructions may suggest a certain time frame, it's essential to adjust based on your hair's specific needs and to always perform a strand test to avoid over-processing. The key is to find a balance that achieves the desired results without causing damage to your hair.

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And the application times on their instructions call for 13, 15 or 18 minutes depending upon the coarseness/resistance of your hair. However, my hair is fine to medium and I leave my relaxer in for 21-25 minutes.Dec 7, 2013read more >>