Yes, you can bleach dirty hair, and in fact, it's often recommended!
Many people believe that hair must be squeaky clean before bleaching, but that's actually a myth. Stylists generally advise against washing your hair immediately before a bleaching session.
Why Dirty Hair is Better for Bleaching
Here's why it's often better to bleach hair that hasn't been freshly washed:
-
Scalp Protection: The natural oils produced by your scalp (sebum) act as a protective barrier. This barrier helps to shield your scalp from the harsh chemicals in bleach, reducing the risk of irritation, burning, and discomfort.
-
Reduced Damage: Oily hair is often less porous and more resistant to chemical damage. The oils create a coating on the hair shaft, which can help to slow down the bleaching process and prevent over-processing.
-
More Even Results: Slightly oily hair can sometimes help the bleach distribute more evenly, leading to a more uniform and consistent color lift.
How Dirty is Too Dirty?
While some oil is beneficial, excessively dirty hair is not ideal. You want to avoid:
-
Product Buildup: Excessive amounts of hairspray, gel, or other styling products can interfere with the bleaching process.
-
Excessive Oil: Hair that's weighed down with days (or weeks) of oil can create a barrier that prevents the bleach from properly penetrating the hair shaft.
-
Dirt and Grime: Visible dirt and grime will absolutely interfere with the bleaching process.
Ideal: Aim for hair that hasn't been washed for 1-2 days.
What to Do Before Bleaching
- Skip the Shampoo: Do not wash your hair for at least 24-48 hours prior to bleaching.
- Avoid Heavy Products: Avoid using heavy styling products in the days leading up to your bleaching appointment.
- Consider a Scalp Treatment: If you have a sensitive scalp, consider applying a scalp oil a few hours before bleaching.
In Summary
Bleaching dirty hair is not only acceptable but often preferred for scalp protection and reduced hair damage. Just make sure your hair isn't excessively dirty with product buildup or visible grime.
