Don't dry out. Apply a body oil all over before getting in the shower. This creates a barrier on your skin, allowing the tan to last longer. Exfoliate lightly. Every few days, gently exfoliate so your tan stays even. Make it last. Lengthen the life of your tan with a gradual tanning moisturizer (Pradas likes Jergens).
typology - classification according to general type. classification, compartmentalisation, compartmentalization, assortment, categorisation, categorization - the act of distributing things into classes or categories of the same type.
Mineralogy is a mixture of chemistry, materials science, physics and geology. Mineralogy is a subject of geology specializing in the scientific study of chemistry, crystal structure, and physical (including optical) properties of minerals.