Why is aluminium foil used when dyeing hair? Here’s the reason behind it

Foil acts as a key protective layer, stopping hair dye from bleeding onto other strands. It effectively retains moisture, ensuring the hair color sets beautifully and consistently. However, the heat generated can potentially harm the hair if not attentively controlled by stylists. Experts vigilantly assess the foil-wrapped sections to avoid excessive processing, underscoring foil’s essential role in the chemistry of hair coloring techniques.
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