If a person exposes their face to the sun,frowns,laughs or otherwise expresses emotions,then the face will develop expression lines,character lines,laughter lines,crows feet and visible signs of ageing,collectively known as wrinkles.In 1941 Maison de Navarre wrote that if it were possible to create a product to remove and eliminate these lines then the inventor would reap a rich reward.Various approaches are available for achieving this desirable result.Improving skin moisture content keeps it plump and supple,increasing collagen and elastin content provides a similar result,removing dead skin cells with keratolytic agents is said to stimulate new cell proliferation and there are many other suggestions for preventing wrinkle formation and for their long-term improvement.
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