Here's why:
* Uneven Processing: Damp or wet hair can absorb the bleach unevenly. The water dilutes the bleach in some areas more than others, leading to splotchy or inconsistent lightening.
* Increased Damage: Wet hair is more porous and weaker than dry hair. Applying bleach to already weakened hair significantly increases the risk of damage, breakage, and rubbery strands.
* Unpredictable Results: Bleach reacts differently on wet hair, making it difficult to predict the final color and level of lift.
* Scalp Irritation: Moisture on the scalp can increase sensitivity to the chemicals in bleach, leading to burns or irritation.
Instead, bleach should always be applied to dry, unwashed hair.
* This allows for even distribution and consistent lightening.
* The natural oils in unwashed hair provide a barrier that protects the scalp.
Important Safety Considerations:
* Bleaching your hair is a chemical process that can cause significant damage if not done correctly.
* Always do a strand test before bleaching your entire head to check for allergies and assess how your hair will react.
* Follow the instructions on the bleach product carefully.
* Consider consulting a professional hairstylist, especially if you're making a significant color change or if you have damaged hair.