Peeling Indications in Dark Skin

Peel indications differ between light and dark skin. Key indications in Fitzpatrick s skin types I-III include photodamage, rhytides, acne. 

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The test is conducted by applying melted paraffin wax to the back of a suspect s hands. With a brush, the back of the hand is coated with paraffin wax which on cooling solidifies and can be peeled off the hand. The surface of the cast that has been in contact with the skin is treated with diphenylamine/sulfuric acid reagent by dropwise addition or spraying. The reagent produces a blue color with individual particles of nitrates and nitrites. The reaction sequence is as shown in Figure 16.1.117The detection of dark blue spots was considered as indicative of the presence of nitrates and/or nitrates from FDR. 

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