Perfect DD Cream SPF 20
Preparation:Disperse the Veegum Ultra and Keltrol CG SFT in Pricerine 9091 and add water with stirring. Once fully hydrated add the Solaveil™ XT-40W with stirring. Combine the Phase A ingredients with stirring. Pre-blend Phase C with a pestle and mortar and add to Phase A with stirring until homogenous. Homogenise the oil phase for three minutes to disperse the pigments fully. Add Phase A to Phase B with stirring until homogenous. Homogenise for a further three minutes. Adjust the pH with lactic acid to below 4.5 whilst stirring and add the preservative Euxyl K172. Add the Venuceane and mix until homogenous.
Notes:Appearance: Medium tan cream pH: 5.55 Viscosity: 6,520 cP +/- 10% (Spindle 3, 10 rpm, 1 minute, ambient, Brookfield DV-I+) Stability: 3 months at 45°C, 40°C, 5°C and room temperature. 1 month at -5/40°C In vivo SPF: 23 (ISO 24444:2010, 5 subjects, AMA Laboratories, USA), Label SPF 20 In vitro critical wavelength (FDA 2011 protocol, Croda): 380 nm In vitro UVAPF (COLIPA 2011 on no pigments formulation): 9, equivalent to PA+++ Ratio SPF/UVAPF: 2.55
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