conditioners hair lighteners coloring and non coloring hair rinses hair tints hair wave sets permanent waves curling hair straighteners hair grooming aids hair tonics hair dressings and oxidative products spritzes styling waxes and balms for this example section the weight average molecular weight of polymer was determined by a size exclusion chromatography multi angle laser light scattering or sec malls technique size exclusion chromatography sec was performed by using a series of tsk gel pw columns from tosoh bioscience a multi angle laser light scattering detector malls model dawn dsp f and an interferometric refractometer optilap dsp from wyatt technology data collection and analysis were performed with astra software from wyatt technology a tensile strength test was done on chemically damaged hair the protocol included the following steps virgin brown hair was bleached by immersion in 6 hydrogen peroxide solution containing 1 7 ammonium hydroxide and 10 urea at 40 u00b1 1 u00b0 c for 15 minutes the bleached hair was then treated in 1 solid polymer solution for 5 minutes and rinsed under deionized water for 10 seconds the diameter of forty hair strands was randomly selected from each treated and untreated u201c control u201d testing group were measured using a fiber dimensional analysis system mitutoyo model lsm 5000 the hair samples were placed in a diastron miniature tensile tester model 170 670 for the determination of tensile strength in a wet condition the total work force normalized with hair diameter was calculated by using diastron software mttwin application software version 5 0 the mean values obtained from 40 hair strands were analyzed using tukey hsd statistical analysis to compare all the testing pairs anova one way analysis of variance from jmp statistical software sas institute cary n c u s the testing.