Seasonal Coloring
A principal of coordinating certain groups of colors that are flattering to particular kinds of coloring. Broken into four categories: Spring, Summer, Autumn and Winter.
Sebum
Natural oils in the skin and scalp that lubricate and protect.
Silica (silicon dioxide)
Absorbent, anti-caking, abrasive.
Silicone
A compound of silicon used in shine-enhancing hair products to seal the cuticle of hair and in many oil-free cosmetics.
Sodium Chloride
Common table salt used as an astringent/antiseptic.
Sodium Lauryl Sulfate
A white powder used as a detergent, emulsifier, and surfectant in cosmetics. A very strong degreaser. Also used as a water "softener".
SPF
An acronym for "Sun Protection Factor" ranging from 2 to 45 with 2 being the least protection and 45 the most. See also SUNSCREENS/SUN INDUCED DAMAGE.
Squalene
Shark-liver oil.
Stearic Acid and Stearyl Alcohol
Used for its emollient properties and as a moisturizing ingredient.