Fudge Catalyst Peroxide 20 Vol 1000ml is a professional 6% (20 volume) peroxide developer from cult British professional haircare house Fudge. Designed for use with Fudge Headpaint permanent and demi-permanent colour, the 20 Vol developer delivers up to 1–2 levels of lift — perfect for tone-on-tone services and grey coverage. For professional hairdressing use only. About Fudge Catalyst Fudge is the cult British professional haircare house, internationally celebrated for trend-led salon styling and colour. Catalyst Peroxide is its dedicated salon-strength developer range. Key features Format: peroxide developer Strength: 6% (20 volume) Action: 1–2 levels of lift, grey coverage Use: mix with Fudge Headpaint colour Size: 1000ml salon size Who it's for Best for professional hairdressers performing tone-on-tone or grey-coverage services with Fudge Headpaint — for salon use only. How to use Mix with Fudge Headpaint colour at the manufacturer-specified ratio (typically 1:1). Apply to dry, unwashed hair as directed. Process for the recommended time. Rinse thoroughly and follow with Fudge post-colour care. Specifications Size: 1000ml Format: Peroxide developer Strength: 6% (20 vol.) Brand: Fudge Range: Catalyst Peroxide Use: Professional only