The Measurement of Skin Color

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Abstract
A portable instrument has been constructed which utilizes as its essential element the Martens polarization photometer, the eyepiece of which is modified to permit insertion of red, green and blue standard Wratten filters. Automobile headlight bulbs run with a storage battery or with standard electric current illuminate the interior and objective aperture of an integrating sphere set onto the objective end of the photometer. Readings made with the instrument on skin are expressed in their relation to readings made on white MgCO3. The device is easy to use and check readings are consistent.

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