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ONDAE - bureau for optical non destructive analysis engineering
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Measurement of hair samples of the same person after hydrogen treatment. The samples were illuminated with a UVB dosage of 7mJ and immediately afterwards the light emission decay was recorded. By comparing e.g. the integral of the curves the degree of damage can be correlated (black: untreated, green: once bleached, red: twice bleached). These measurements do not destroy the hair sample as with conventional measuring methods. They can still be reproduced after long time.
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