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e-value of an optical brightening agent is the absorbance value obtained (in the UV region), when the absorbance of 1% solution is measured using a cuvette of 1 cm path length.
T.J.R.PILLAI
Wiki User
∙ 11y ago
The e-value of an optical brightening agent refers to its extinction coefficient, which describes how strongly it absorbs light at a specific wavelength. It can be used to quantify the brightness enhancement effect of the optical brightening agent in a given application.
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