Presentation is loading. Please wait.

Presentation is loading. Please wait.

Chemistry in Hair Relaxing Chemistry in Hair Relaxing Permanently Straighten Hair.

Similar presentations


Presentation on theme: "Chemistry in Hair Relaxing Chemistry in Hair Relaxing Permanently Straighten Hair."— Presentation transcript:

1 Chemistry in Hair Relaxing Chemistry in Hair Relaxing Permanently Straighten Hair

2 Chemical Hair Relaxing Chemical Hair Relaxing is a procedure that permanently straightens extremely curly hair into a straight form. Chemical Hair Relaxing is a procedure that permanently straightens extremely curly hair into a straight form. Two most common hair relaxers are: Two most common hair relaxers are: Thio and Sodium Hydroxide relaxers. Thio and Sodium Hydroxide relaxers.

3 Hair Structure Hair contains millions of polypeptide chains, that consist of side bonds. Hair contains millions of polypeptide chains, that consist of side bonds. Side bonds include, hydrogen, salt, and disulfide, (the strongest bond). Side bonds include, hydrogen, salt, and disulfide, (the strongest bond). Hydrogen and salt bonds can be broken by heat and moisture. Hydrogen and salt bonds can be broken by heat and moisture.

4 Disulfide Bonds Disulfide bonds can only be broken by a chemical, such as in hair relaxer products. Disulfide bonds can only be broken by a chemical, such as in hair relaxer products. Hair relaxers straighten the hair by breaking disulfide bonds, and the neutralizer hardens the hair in it’s straighten form. Hair relaxers straighten the hair by breaking disulfide bonds, and the neutralizer hardens the hair in it’s straighten form.

5 Thio Relaxers Thio relaxers usually have a Ph factor of 10 and higher. Thio relaxers usually have a Ph factor of 10 and higher. Hair softens and swells during the relaxer process, and disulfide bonds are broken. Hair softens and swells during the relaxer process, and disulfide bonds are broken. Relaxers are thick, which helps hold the hair in a straight position. Relaxers are thick, which helps hold the hair in a straight position. Fatty materials are mixed in the relaxers, which allows product to remain on hair. Fatty materials are mixed in the relaxers, which allows product to remain on hair.

6 Thio Neutralizers The neutralizer provides an oxidation reaction that rebuilds the hair bonds in a straighten form. The neutralizer provides an oxidation reaction that rebuilds the hair bonds in a straighten form. It breaks bonds by adding hydrogen atoms to the two sulfur bonds within the disulfide bond. It breaks bonds by adding hydrogen atoms to the two sulfur bonds within the disulfide bond.

7 Hydroxide Relaxers Hydroxide Relaxers Hydroxide Relaxers active ingredient is hydroxide ion. Hydroxide Relaxers active ingredient is hydroxide ion. Highly alkaline product, ranging usually from on the Ph scale. Highly alkaline product, ranging usually from on the Ph scale. Types of Hydroxide Relaxers include: Types of Hydroxide Relaxers include: Sodium, potassium, lithium, and guanidine hydroxide. Sodium, potassium, lithium, and guanidine hydroxide.

8 Sodium Hydroxide Sodium Hydroxide is highly caustic. Sodium Hydroxide is highly caustic. It is also known as lye or caustic soda. It is also known as lye or caustic soda. Ph is often over 13.5, which is highly corrosive. Ph is often over 13.5, which is highly corrosive. Hair can swell twice it’s original size. Hair can swell twice it’s original size. Sodium Hydroxide is the same chemical used in drain cleaners and chemical hair depilatories Sodium Hydroxide is the same chemical used in drain cleaners and chemical hair depilatories Cautions is advised-relaxers can literally dissolve or melt the hair. Cautions is advised-relaxers can literally dissolve or melt the hair.

9 Sodium Hydroxide Relaxers Sodium Hydroxide Relaxers break the disulfide bonds differently than Thio Relaxers. Sodium Hydroxide Relaxers break the disulfide bonds differently than Thio Relaxers. Sodium Hydroxide Relaxers break the disulfide bond between the sulfur and carbon atoms. Sodium Hydroxide Relaxers break the disulfide bond between the sulfur and carbon atoms. Thio relaxers break between two sulfur atoms. Thio relaxers break between two sulfur atoms. The bonds broken by Sodium Hydroxide can never be reformed. The bonds broken by Sodium Hydroxide can never be reformed.

10 Warning!!! Sodium Hydroxide Relaxers are NOT compatible with Thio Relaxers!!! Extreme damage could occur!!! Extreme damage could occur!!!

11 Works Cited Milady’s Textbook, copyright 2004 Milady’s Textbook, copyright 2004 Hair Structure and Chemistry Simplified Hair Structure and Chemistry Simplified by John Halal, Fifth Edition, 2009 by John Halal, Fifth Edition, 2009


Download ppt "Chemistry in Hair Relaxing Chemistry in Hair Relaxing Permanently Straighten Hair."

Similar presentations


Ads by Google