Frequently Asked Questions

Get answers to common questions about Bigen.

Bigen is a permanent-type dye that generally lasts several weeks to months, depending on hair porosity, washing frequency, and sun exposure. Expect gradual fading rather than immediate loss; touch-ups every 4–8 weeks maintain depth and even tone.

Bigen can be used on chemically treated or previously colored hair, but results vary. We perform consultations and strand tests to assess condition, porosity and color compatibility, recommending bonding treatments or alternative formulas when necessary to protect hair integrity.

Allergic reactions are rare but possible; we require a patch test for first-time Bigen clients and those with sensitive skin. Follow aftercare instructions, avoid excessive processing, and contact us immediately if you experience severe itching, swelling, or persistent redness.

Come with dry, unwashed hair if instructed, or follow our prep guidelines provided at booking. Avoid heavy styling products, clarify buildup the day prior if needed, and disclose recent chemical services so we can adapt the application for optimal results.

Use sulfate-free color-safe shampoo and conditioner, wash less frequently with cool water, and apply UV and heat protectants. Use a color-depositing conditioner or gloss if fading occurs, and schedule salon touch-ups to correct regrowth and preserve tone.

When correctly applied by professionals and with proper aftercare, Bigen minimally affects texture. Repeated or improper use can cause dryness and breakage. We recommend conditioning treatments, periodic trims, and professional assessments to keep hair healthy while enjoying rich color.