RPR Colour U 1.10 100ml is a professional permanent hair colour designed to deliver blue-black ash tones with intense depth and maximum cool control. This shade combines a level 1 base with ash reflect to neutralise unwanted warmth, creating a deep, rich black finish with a cool undertone.

The Colour U system is a superior hair colour cream enriched with Cashmere Keratin and Black Pearl Minerals, helping to condition, smooth, and enhance shine during the colouring process. It also includes UV reflectors to protect the hair and maintain long-lasting colour vibrancy.

This advanced formula provides consistent, fade-resistant results with excellent grey coverage and professional salon-quality performance. It is part of a low-ammonia system with intermixable shades, allowing for precise colour control.

Key Benefits:
• Blue-black ash tone for deep, cool results
• Neutralises unwanted warmth and red undertones
• Long-lasting, fade-resistant colour
• Excellent grey coverage
• Enriched with keratin for smoother, conditioned hair
• Enhances shine and colour longevity
• Professional salon-quality performance

How to Use:
Mix with developer in a 1:1.5 ratio (e.g. 50g colour + 75g developer). Apply evenly to dry hair, process as required, then rinse thoroughly and follow with conditioner.

Ideal For:
Permanent hair colouring, grey coverage, and achieving deep cool black/blue-black tones