What 20 Volume Developer Does:
* Lifts 1-2 Levels: 20 volume developer is considered a low-volume developer. It's generally used for achieving 1-2 levels of lift. This makes it suitable for subtle lightening and achieving lighter shades on hair that's already relatively light.
* Opens the Hair Cuticle: It opens the hair cuticle to allow the color or lightener to penetrate.
* Deposit & Lift: It's often paired with permanent hair color to deposit color and provide a small amount of lift.
* Highlighting: It is often used for highlighting, creating lighter strands of hair against a darker base.
Factors to Consider:
* Hair Color: If you have very dark hair (level 1-3), 20 volume alone may not lift it enough to achieve a noticeable highlight or lightened look. You might need a higher volume developer or multiple applications.
* Desired Result: If you want a significant change in color, like going from dark brown to blonde, 20 volume won't be sufficient.
* Hair Condition: 20 volume is less damaging than higher volumes (30 or 40), but it can still cause dryness and damage, especially with repeated use or if your hair is already compromised.
* Formula: The type of lightener or hair color you mix with the developer significantly affects the result. Some lighteners are stronger than others.
* Processing Time: How long you leave the mixture on your hair affects the level of lift. However, don't exceed the recommended processing time, as this can damage your hair.
Important Precautions:
* Strand Test: Always perform a strand test before applying any hair color or lightener to your entire head. This will help you determine how the product will affect your hair and avoid unexpected results.
* Follow Instructions: Carefully read and follow the instructions provided with the hair color or lightener you are using.
* Professional Advice: If you're unsure about using 20 volume developer or achieving a specific result, it's best to consult a professional hairstylist.
In summary: 20 volume developer is a versatile option for subtle lightening and highlighting, especially on lighter hair colors. However, it's crucial to consider your hair type, desired result, and follow all instructions to minimize damage and achieve the best outcome.