METHOD OF EVALUATING AND MEASURING THE APPARENT OR PERCUSED QUANTITY OF HAIR IN A WHEAT WHICH COULD HAVE BEEN SUBJECTED TO PRIOR CAPILLARY TREATMENT

摘要

The present invention relates to a method for evaluating and measuring the apparent or perceived amount of hair in a wick (300) having optionally undergone previous hair treatment, said method comprising the steps of: arranging a lock of hair through an opening (102) of an iris optical diaphragm (100); - progressively decreasing the opening diameter of the iris while measuring the closing voltage of said diaphragm according to its diameter of closing around the wick.