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The nail and cosmetics



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The main areas of medical involvement with nail cosmetics are: 1 where nail cosmetics cause alteration or damage to the nails and periunguium [1,2] 2 where nail cosmetics cause allergic contact dermatitis locally and ectopically, such as of the eyelids [1,2] 3 where nail disease has limited therapeutic options and nail cosmetics can provide an important supplement to dermatological management [3] . To understand these areas it is helpful to have some knowledge of the agents and techniques used in cosmetic nail care. Nail coatings represent an attractive nail enhancement. They may harden upon evaporation (nail polish) or polymerize (sculptured nails, gels, preformed artificial nails). The term ‘nail lacquer’ is sometimes used to include enamels, top coats and base coats, either as separate entities or combined in one product. Although chemically similar, they contain different ratios of the same constituents to lend different characteristics. The base coat is used to improve the adhesion or bonding of enamel to the nail. A top coat improves the depth and lustre of the enamel and increases its resistance to chipping and abrasion. Nail polishes consist of solids and solvent ingredients, the former representing about 30%, the latter 70% of the product. The ingredients can be divided into six principal groups. 1 cellulose film formers (e.g. nitrocellulose): provide gloss, ... log in or subscribe to read full text

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