Title

The Effect of Permanent, Semi-Permanent, and Temporary Dyes on the Tensile Strength of Hair

Author(s)

Briana GrayFollow

School Name

Spring Valley High School

Grade Level

11th Grade

Presentation Topic

Consumer Science

Presentation Type

Non-Mentored

Oral Presentation Award

3rd Place

Written Paper Award

3rd Place

Abstract

The use of hair dye is becoming more prominent because of new trends and concealing white hair in older people. It has been known that excessive amounts of hair dye can cause damage to the hair, leading to an abundance of breakage. Testing to see if multiple applications of a weaker hair dye is less damaging than one or few permanent applications can benefit users from damaging their hair so drastically. The distinction between the damages of different types of hair dyes was determined in this study. It was hypothesized that the semi-permanent hair dye group would have the greatest average tensile strength after the coloration processes. Samples with semi-permanent, permanent, and temporary dyes were applied and tested for their tensile strength after the dye application. An ANOVA test was run, showing that the four means were statistically significantly different with a p<.00001 at a confidence level of 95%, α = 0.05. However, the hypothesis that the semi-permanent hair dye group would have the highest average tensile strength, was not supported.

Location

Founders Hall 255 A

Start Date

3-30-2019 10:15 AM

Presentation Format

Oral and Written

Group Project

No

COinS
 
Mar 30th, 10:15 AM

The Effect of Permanent, Semi-Permanent, and Temporary Dyes on the Tensile Strength of Hair

Founders Hall 255 A

The use of hair dye is becoming more prominent because of new trends and concealing white hair in older people. It has been known that excessive amounts of hair dye can cause damage to the hair, leading to an abundance of breakage. Testing to see if multiple applications of a weaker hair dye is less damaging than one or few permanent applications can benefit users from damaging their hair so drastically. The distinction between the damages of different types of hair dyes was determined in this study. It was hypothesized that the semi-permanent hair dye group would have the greatest average tensile strength after the coloration processes. Samples with semi-permanent, permanent, and temporary dyes were applied and tested for their tensile strength after the dye application. An ANOVA test was run, showing that the four means were statistically significantly different with a p<.00001 at a confidence level of 95%, α = 0.05. However, the hypothesis that the semi-permanent hair dye group would have the highest average tensile strength, was not supported.