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Hess-Ives Colour Units

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Path Length: 10, 25 or 50 mm [Upgrade includes 10mm]

These colour units are based on the spectrophotometric measurement of clear liquids using the red, green and blue/violet regions of the spectrum. The three percentage transmittances are corrected to a single figure which becomes an Hess-Ives colour unit. Hess-Ives colour units are used by the chemical and surfactant industries.

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