How Does Spray Tanning Work?
Spray Tanning is accomplished in part by application of a solution containing the active ingredient DHA (Dihydroxyacetone). DHA is derived from plant source such as sugar beets and sugar cane. DHA reacts chemically with the amino acid groups, which are part of the protein containing Keratin layer on the skin's surface, forming a brown color to the skin. The reaction is similar to the browning of an apple after it has been sliced and exposed to air.
Once sprayed, you will have an instant bronzed look produced by the cosmetic bronzer (color guilde) in the solution and the tan will develop in the next 8-24 hours. After showering it is normal for the initial bronzer to wash away and the developed tan will stay on your skin. The developed tan can last up to 10 days. This depends on the skin type, DHA concentrate, preparation to the skin prior to spray tan and after care to the skin as well. The tan will fade gradually as the dead skin cells slough off, just as in a normal tan.