For example, a larger number of long segment breaks and fewer short segment breaks were produced by wet combing, see the data of Table V. WET VERSUS DRY COMBING AND BREAKAGE Wet combing produced interesting and contrasting results compared to dry combing. We intend to repeat these results after making adjustments to the mechanical combing to produce a larger number of broken hairs. Even though the results show similar effects numerically, because of the large variance for mechanical combing the data of Table 4 are not statistically significant. ![]() The data of Table IV show that for many more comb strokes there were fewer broken hair fragments by mechanical combing than by hand combing. This hand combing technique was developed to maximize reproducibility rather than to mimic combing hair on the head, however, the comber and technique were tested during the late 1980's and 1990's in a series of consumer tests in Asia, Europe and Latin America where a range of conditioning products were tested for combability/conditioning and the consumer response was in complete agreement with the combing results. This was a mistake, because as the results show, the hand combing was obviously more vigorous, probably in part due to thumb pressure on the hair to hold it snugly in the comb during hand combing and most likely a faster comb stroke. We tried to simulate the conditions for hand combing by using the same size hair tresses and the same length of comb stroke as for hand combing. MECHANICAL COMBING Mechanical combing of hair produced unexpected results. ![]() 482 JOURNAL OF COSMETIC SCIENCE conditioners reduce end wrapping and the abrasive damage that occurs to the fiber-ends and in that manner they produce a decrease in short segment breakage.
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