Applicable Scenarios for Permanent Hair Dyes

Permanent hair dyes achieve long-lasting color through chemical oxidation, making them ideal for those seeking a lasting result, though they should be applied with care.

I. Applicable Scenarios

Long-lasting coverage: Ideal for those with significant gray hair or who desire a dramatic color change, with results lasting several months.

Hair type compatibility: Suitable for healthy hair; damaged hair should be repaired first. Individuals with sensitive scalps should perform a patch test to check for allergies.

II. Operating Steps

Preparation: Ensure hair is dry and clean, wear gloves, and apply petroleum jelly along the hairline for protection.

Mixing and Application: Mix the hair dye with the developer according to the manufacturer’s instructions, then apply evenly from the roots, avoiding the hairline. Leave on for 20–30 minutes.

Rinsing and Care: Wash thoroughly with lukewarm water, avoid scratching, and use color‑protecting shampoo and conditioner to repair damage.

III. Precautions

Frequency control: Allow at least three months between hair dyeing sessions, and limit to no more than four applications per year to minimize cumulative damage.

Contraindicated populations: Pregnant women, breastfeeding mothers, and individuals with allergic constitutions should avoid use; children should be kept away.

Environmental Safety: Ensure adequate ventilation during use to minimize inhalation of volatile gases.

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2026-05-14