Method for quantitatively determining eyelash clumping

摘要

A method for quantifying clumping in fibrous materials is disclosed herein. In some examples, the method may be utilized for quantifying clumping in keratinous materials such as eyelashes when a composition such as mascara is applied thereto.

主权项

1. A method for quantitatively determining eyelash clumping, the method comprising:
a. providing an eyelash substrate comprising an array of eyelashes, each eyelash having a length defined by a base and an opposing tip; b. capturing a first image of the eyelashes prior to depositing a mascara for use as a ghost image; c. applying an amount of the mascara to the eyelashes; d. capturing a second image of the eyelashes with the mascara applied thereto; e. analyzing a first portion of second the image to obtain first individual thickness measures for each eyelash disposed in the first portion; f. analyzing a second portion of the second image to obtain second individual thickness measures for each eyelash disposed in the second portion; g. obtaining first average thickness measures from the first individual thickness measures and second average thickness measures from the second individual thickness measures; h. applying a weighting function to the first and second average thickness measures to generate first and second weighted thickness values; and i. obtaining a Weighted Average Thickness value from the first and second average thickness measures to provide a quantitative determination of eyelash clumping; j. wherein the second image of the eyelashes with the mascara applied thereto is superimposed on the ghost image and aligned therewith.