Achieve professional-grade lightening results with our Blue Base 40 Volume Cream Developer. Formulated with a cooling blue undertone, this creamy developer neutralizes unwanted warm tones while lifting hair up to 4 levels. The rich, conditioning cream formula minimizes damage and dryness, leaving hair soft and manageable. Perfect for blonde, highlighted, or color-correcting applications, it delivers consistent, predictable results every time. Mix with your favorite lightener for salon-quality transformations at home or in the studio.