To understand how these lotions work, sometimes learning about the design of the skin can help get the depth of color desired as well as determine the best self tanning lotion for you. Basically, the skin has two layers. The outer layer is called the epidermis and the inner layer is the dermis.[youtube:Au-BvZ4_hNk?version=3;[link:Sun Labs Self Tanning Lotion];http://www.youtube.com/watch?v=Au-BvZ4_hNk?version=3&feature=related]
The goal of self tanning lotion is to alter the appearance of the outer layer without causing damage to the inner layer. The epidermis is not made up of a single layer either. Instead, it is made up of two layers as well. The inner layer is called the stratum basale and it is what turns color when sunbathing.
The stratum corneum or outer layer, on the other hand, is where tanning lotions have the most effect. To achieve the best results, therefore, finding lotions that work best on the stratum corneum is important. Despite this fact, the use of self tanning lotion is not a new concept.[I:http://cosmoread.com/wp-content/uploads/HaywoodHunter1.jpg]
The first to introduce self tanning lotion was Coppertone, who released their product in 1960. Since that time many changes have been made as it originally turned skin orange. The result is tanning products that can turn skin from a dark tan to anything lighter with applications using various methods.
Self tanning lotion often takes between 45 minutes to one hour before it starts working, then another two hours to dry. However, with self tanning lotion containing dihydroxyacetone the color lasts between five to seven days. This is because this ingredient interacts with dead skin cells in the epidermis turning them dark.
With newer types of self tanning lotion on the market today it is easier than ever to maintain the color desired. Moisturizers, sprays, and powders are convenient forms of self tanning lotion and easy to apply. When going outside, however, sunscreen will need to be used in addition to self tanning lotion.