Science of Spray Tan Solutions - What DHA Really Does
, by Lynsey Bennett, 2 min reading time
Most artists can spray. Few understand the science behind what they’re spraying. DHA (dihydroxyacetone) is the ingredient that creates colour - but how it’s sourced, stabilized, and balanced with skincare ingredients determines everything from tone to longevity. Understanding DHA is how you move from ‘technician’ to expert.
1. What DHA Actually Is
DHA is a simple sugar derived from plants. When applied to the skin, it reacts with amino acids in the surface layer, creating melanoidins — the compounds that give that bronzed appearance. This reaction happens in 2–6 hours and deepens over 24. The catch: not all DHA is created equal. Low-grade DHA oxidizes fast, producing orange or patchy tones.
2. Why Concentration Matters
DHA percentage isn’t just about darkness - it’s about suitability: - 6–8% for fair or cool undertones. - 9–11% for medium skin or neutral tones. - 12–14%+ for olive, deep, or resistant skin types. Professional artists blend and layer shades - they don’t rely on ‘one bottle fits all.’
3. Ingredients That Change Everything
A superior tan isn’t only DHA - it’s what’s around it: - Aloe vera & hyaluronic acid: maintain hydration and even fade. - Vitamin A & E: neutralise free radicals. - No alcohol, parabens, or mineral oils: these strip skin and ruin longevity. The difference between a £6 bottle and a £25 bottle is skin health, not colour depth.
4. How Storage and Expiry Impact Results
DHA breaks down with heat, light, and time. - Store under 20°C. - Use within 6 months of opening. - Always shake before each use (even separation = uneven results). If your tans suddenly shift tone or fade faster, check your stock before blaming your technique.
5. Matching DHA to Client Lifestyle
Office worker vs. gym regular = different tan chemistry. - Heavy sweaters or swimmers? Use lower DHA + rapid rinse. - Dry skin? Choose a formula rich in humectants. - Bride? Avoid cosmetic bronzers that could transfer on fabric. Science-backed customization is your edge.
Understanding DHA separates the pros from the pack. It’s how you choose formulas that deliver consistent, natural, and skin-safe results - the foundation of every successful spray tan business.
Learn to master DHA application and custom blending in the Lusso Pro Artist Training.