Permanent Hair Color REVLON Colorstay Castanea N 4 (permanent hair dye)

Permanent Hair Color REVLON Colorstay Castanea N 4 is a permanent hair dye formulated to deliver a chestnut brown shade with long-lasting pigment and full coverage. Designed for natural and previously treated hair, this product provides uniform color payoff and is intended for at-home or professional application when used with the appropriate oxidant and following safety instructions. The formula aims to refresh tone, change hair color, or cover grey hair while maintaining a consistent result across the hair surface.

Advantages

The REVLON Colorstay Castanea N 4 offers durable color retention and even coverage for both natural and chemically treated hair. Its permanent formulation provides reliable grey coverage and helps achieve an even chestnut brown tone. The product is suitable for controlled at-home application or use in salon settings when combined with the correct developer, resulting in predictable, repeatable color results.

Suitable for

• Changing natural hair color to chestnut brown
• Refreshing or deepening existing brown shades
• Covering grey or white hair
• At-home coloring with proper safety measures
• Professional use in salons for permanent color services

Key specifications

• Color tone: Chestnut brown (Castanea)
• Coverage type: Permanent coloration with full grey coverage
• Target hair: Natural and previously treated hair
• Application environment: At-home or professional salon use
• Result: Long-lasting pigment and uniform color payoff

How to use

Follow the included instructions and safety precautions exactly. Perform a skin allergy test 48 hours before application. Mix the hair dye with the appropriate developer according to the product leaflet and apply to dry, unwashed hair or as directed. Distribute the mixture evenly from roots to ends, process for the recommended time, then rinse thoroughly until water runs clear and apply conditioner if provided. For best results, follow any timing and dilution guidelines on the packaging and adjust technique based on hair length and prior chemical treatments.

Usage recommendations

Use gloves and protective clothing to avoid staining. Do not use on damaged or irritated scalp. For first-time color changes or significant tone shifts, consider a professional consultation. Maintain color with color-safe shampoos and conditioners and avoid excessive heat or harsh chemical treatments shortly after coloring.