Possible Outcomes:
* Lighter Hair Color: 30 volume developer is stronger than 10 or 20 volume, and it lifts more pigment. This means your hair will likely be lighter than you intended. The level of lift will depend on how long you left the color on, your hair's natural pigment, and the specific color you used.
* Warm Undertones: Dark hair often has red or orange undertones. A stronger developer like 30 volume can expose these undertones, leading to a brassy or orange appearance, especially if you didn't use a toner or ash-based color.
* Damage to Hair: 30 volume developer is harsher on the hair than lower volumes. It can cause dryness, breakage, and make the hair more prone to damage, especially if your hair is already damaged or fine. This is because the higher volume opens the hair cuticle more aggressively to deposit color.
* Uneven Color: If the application wasn't precise or even, the stronger developer might lead to uneven color results, with some sections lighter or more brassy than others.
* Scalp Irritation: A stronger developer can sometimes cause more scalp irritation or sensitivity, especially if you have a sensitive scalp to begin with.
Factors that Influence the Outcome:
* Your Natural Hair Color: Very dark hair (level 1-3) might not lift as dramatically as lighter dark hair (level 4-6).
* The Specific Hair Color Used: The type and formulation of the hair color product play a role. Some colors are formulated to work better with higher volumes, while others are more sensitive.
* Processing Time: The longer you left the color on, the more significant the lifting and potential damage.
* Hair Condition: Healthy, undamaged hair will generally withstand the process better than already damaged or chemically treated hair.
* Hair Porosity: Porous hair absorbs color and chemicals more quickly, which can lead to faster processing and potentially more damage.
What to Do Now:
1. Assess the Damage: Carefully examine your hair. Is it dry, brittle, or excessively tangled? Are there signs of breakage?
2. Deep Condition: Immediately use a deep conditioning treatment or hair mask to help replenish moisture and repair some of the damage. Look for products containing ingredients like keratin, argan oil, shea butter, or amino acids.
3. Toning: If your hair is too warm or brassy, consider using a toner to neutralize the unwanted tones. Choose a toner that is appropriate for your current hair level and desired tone.
4. Adjust Your Hair Care Routine:
* Use gentle, sulfate-free shampoo and conditioner: These will be less harsh on your hair.
* Minimize heat styling: Avoid using heat tools like straighteners, curling irons, and blow dryers as much as possible. If you must use them, use a heat protectant spray.
* Avoid harsh chemical treatments: Hold off on perms, relaxers, and other chemical treatments until your hair has recovered.
5. Consider Professional Help: If you're unhappy with the color or your hair is significantly damaged, consult a professional hairstylist. They can assess the situation, provide tailored advice, and perform corrective treatments to minimize further damage and achieve your desired color.
6. Protein Treatment: Incorporating a protein treatment, such as Aphogee, can help to strengthen damaged hair.
Important Considerations:
* Don't panic! While it's not ideal, a mistake with hair dye isn't the end of the world. With proper care and potentially professional help, you can get your hair back on track.
* Patch Test Next Time: Before using any new hair color or developer, always perform a strand test. This will help you see how the product will react with your hair and avoid unwanted surprises.
* Read Instructions Carefully: Always carefully read and follow the instructions on the hair color and developer packaging.
In summary, while using a 30 volume developer on dark hair might not be catastrophic, it can lead to unwanted color results and potential damage. Focus on deep conditioning, toning if needed, and adjusting your hair care routine to help your hair recover. If you're concerned, seek professional help.