Schwarzkopf Professional Igora Royal Permanent Hair Color 4-0 Medium Brown 60g — Salon-Grade, Even Grey Coverage

Schwarzkopf Igora Royal 4-0 is a professional-grade permanent hair color in Medium Brown, formulated to deliver rich, even pigment and reliable grey coverage in a 60 g (2.1 fl. oz.) tube.

Designed for salon use and at-home application by experienced users, Igora Royal 4-0 Medium Brown blends concentrated dyes with Schwarzkopf’s color technology to achieve consistent, long-lasting tone. This permanent cream color integrates with the hair shaft to deposit stable color molecules while enabling predictable mixing and development with the recommended oxidant. The compact 60 g tube is suitable for single-client applications, touch-ups, and detailed work where precise color control matters.

How will this shade perform on natural and previously colored hair?

Igora Royal 4-0 Medium Brown is formulated to give even, uniform results on virgin hair and to reliably refresh or deepen previously colored medium brown bases. It is optimized for predictable lift and deposit when used with the proper developer strength and application technique.

• Even coverage on natural medium brown bases
• Good grey blending depending on grey percentage and technique
• Integrates with existing color for toning or darkening
• Requires correct developer strength for predictable results

What mixing ratio and developer strength should I use for best results?

Follow Schwarzkopf Professional’s guidelines for Igora Royal to choose the correct oxidation level. Typical permanent color mixing uses a 1:1 or 1:1.5 ratio with a matching developer; the developer volume (10, 20, 30, 40 vol) adjusts lift and processing kinetics.

• Common salon practice: 1:1 mixing ratio with the recommended Igora developer
• Use 10 vol for minimal lift and deposit-only results
• Use 20 vol for standard grey coverage and tone adjustment
• Use higher volumes only when controlled lift is required and with professional oversight

How long will the color last and how should I maintain it?

As a permanent oxidative color, Igora Royal locks pigment into the hair structure and offers long-lasting tone retention. Longevity depends on hair porosity, care routine, shampoo frequency, and exposure to UV and heat styling; use color-safe products to extend vibrancy.

• Permanent results that fade gradually with washing and environmental exposure
• Recommend color-safe shampoos and conditioners to preserve tone
• Limit heat styling and use UV protection to reduce fading
• Schedule regular touch-ups for root growth and tone refresh

Are there application tips and safety considerations I should follow?

Apply Igora Royal 4-0 with standard professional color procedures: strand test, allergy patch test, and consistent timing to achieve predictable results. Wear gloves, use non-metallic bowls and brushes, and follow Schwarzkopf’s processing instructions to avoid uneven color or hair damage.

• Perform a patch test 48 hours before use to check for sensitivity
• Do a strand test to preview final tone and processing time
• Use recommended processing times and mix thoroughly for uniform application
• Rinse until water runs clear and follow with a color-safe conditioner

Who is this for? Stylists and experienced colorists seeking a dependable medium brown permanent shade will value Igora Royal 4-0 for its consistent pigment, professional handling properties, and compatibility with Schwarzkopf’s developer range. It is suitable for clients wanting a natural medium brown look, those needing predictable grey blending, or technicians performing single-client, touch-up, or precision color work. Not recommended for first-time at-home users without professional guidance—proper application, developer selection, and safety tests are essential for best results.