What skin and hair conditions should I be especially careful about before using this permanent blonde dye?

Permanent hair color involves chemicals that can cause reactions, so conducting an allergy alert test at least 48 hours before full application is essential, especially if you have a sensitive scalp. The test involves applying a small amount of the mixed colorant behind your ear or on the inner elbow and monitoring for redness, itching, or swelling.

Beyond skin sensitivity, your hair's condition significantly impacts the outcome. Pay extra attention if your hair has been heavily lightened (bleached), as it is more porous and may absorb color unevenly or become overly processed. Recent use of henna or metallic salt colorants (sometimes found in some "progressive" dyes) can cause unpredictable chemical interactions, leading to undesirable color shifts or hair damage. It is also wise to consider your natural starting shade and previous coloring history, as these determine how well the target Natural Blonde 8.0 shade will cover and develop. If unsure, consulting a professional colorist for advice is recommended.