Laura's Spray Tanning

The epidermis is also made up of layers. The outermost layer of the epidermis, the stratum corneum (or horny layer), is where self tanning occurs. DHA reacts with amino acids on the skin and oxygen in the air causing skin to turn brown, giving the appearance of a tan.

That is why the colour change produced by DHA creating the tan effect will gradually fade. A sunless tan Will usually lasts about 5-7 days, although the Sienna X retail range of pre and post tan care products is designed to help your customers keep theirs for longer.