Loreal DIA LIGHT 4 50ML V511

L'Oréal Professionnel DIA Light

The DIA Light line is a hallmark of L’Oréal Professionnel’s commitment to delivering high‑quality, ammonia‑free semi‑permanent hair colour solutions. The product in focus, the 50 ml tube of shade #4 – Medium Brown (Châtain), offers salon‑grade performance with an easy‑to‑apply formula that respects both the hair and scalp.

Key Product Details

• Volume: 50 ml – a convenient size for professional use or personal touch‑ups.
• SKU: E0340601 – unique identifier for inventory and ordering systems.
• Product Type: Ton‑sur‑ton (tone‑on‑tone) – designed to enhance natural hair colour rather than drastically alter it.
• Colour Shade: #4 Medium Brown – a versatile, warm brown that works well on both light and dark hair bases.
• Formulation: Acidic gel‑cream without ammonia – gentle on the scalp while delivering vibrant, long‑lasting colour.

Application Experience

The DIA Light 4 formula is engineered for a smooth, even application. Its gel‑cream consistency allows precise placement and reduces the risk of streaking. The acid base ensures that the pH remains close to that of natural hair, minimizing damage while still providing a rich pigment payoff.

During processing, the product penetrates the cuticle without excessive swelling, preserving the hair’s structural integrity. Users report a noticeable lift in shine and a subtle depth of tone that enhances the overall look without appearing overly processed.

Performance & Longevity

• Colour Intensity: Medium brown with a natural, slightly warm undertone.
• Durability: Maintains vibrancy for up to 6–8 washes when used with sulfate‑free shampoos and conditioners.
• Fade Profile: Even fade that retains the original tone rather than turning grey or dull.

Safety & Compatibility

The ammonia‑free composition makes DIA Light 4 suitable for clients with sensitive scalps or those who prefer a gentler hair colour experience. The acidic gel‑cream also reduces the likelihood of scalp irritation, making it an excellent choice for repeat applications.

Ideal Usage Scenarios

• Salon Treatments: Ideal for professionals looking to provide a subtle, natural-looking lift or maintenance colour.
• Home Touch‑Ups: The 50 ml tube is perfect for personal use when a quick refresh of brown tones is desired.
• Color Correction: Works well as a base layer in multi‑step colour processes, offering a stable foundation for subsequent shades.

Why Choose L'Oréal Professionnel DIA Light 4?

The combination of an ammonia‑free formula**, a **ton‑on‑tone** approach, and a **medium brown shade** makes this product stand out in the semi‑permanent hair colour market. It delivers salon‑quality results while prioritising hair health and scalp comfort.