Here's why:
* Melanin Content: Blonde hair has less melanin (the pigment that gives hair its color) than brunette hair. This means there's less pigment to break down and lighten.
* Pigment Structure: The melanin in blonde hair is typically more loosely packed than in brunette hair. This makes it easier for the bleaching agents to penetrate and break down the pigment.
Factors that can affect lightening speed:
* Original Hair Color: The darker the starting color, the longer it will take to lighten.
* Hair Condition: Healthy hair lightens more easily than damaged or processed hair.
* Bleaching Agent Strength: Stronger bleaching agents lighten hair faster but can also cause more damage.
* Application Technique: Proper application of bleaching agent is crucial for even lightening.
It's important to note that lightening hair can be damaging, especially if done incorrectly. It's best to consult with a professional hairstylist for safe and effective lightening results.