CHAPTER 5 CHEMISTRY 5.1 MATTER 5.2 THE pH SCALE 5.3 CHEMISTRY OF COSMETICS CHAPTER 5 CHEMISTRY | ADVANCE ORGANIZER FOLLOWING THIS LESSON, YOU WILL BE ABLE TO: • Describe matter, elements of hair and structure and behavior of atoms and bonds • Describe pH scale and values associated with water, acids and alkalines • Identify precautions necessary for various classifications of chemicals when working with professional products CHAPTER 5 CHEMISTRY | ADVANCE ORGANIZER 5.1 MATTER ELEMENTS CHEMICAL BONDS CHAPTER 5 CHEMISTRY | MATTER | ADVANCE ORGANIZER MATTER Anything that occupies space SOLID definite weight, volume and shape LIQUID definite weight and volume but indefinite shape CHAPTER 5 CHEMISTRY | MATTER GAS definite weight but indefinite volume and shape PHYSICAL CHANGE Change in the physical characteristics of a substance without creating a new substance When water freezes it becomes ice. It is still water, but now it’s a solid instead of a liquid. CHAPTER 5 CHEMISTRY | MATTER CHEMICAL CHANGE Change in a substance that creates a new substance A chemical change occurs when hydrogen combines with oxygen to form a new substance, water. CHAPTER 5 CHEMISTRY | MATTER CHEMISTRY Scientific study of matter and the physical and chemical changes of matter 1. Organic Chemistry: deals with matter that is living or was alive, with carbon present 2. Inorganic Chemistry: studies matter that is not alive, has never been alive and does not contain carbon CHAPTER 5 CHEMISTRY | MATTER ELEMENTS Basic substances that cannot be broken down into simpler substances Use this acronym to remember the elements found in hair: COHNS Carbon, Oxygen, Hydrogen, Nitrogen, Sulfur CHAPTER 5 CHEMISTRY | MATTER | ELEMENTS ATOMS Smallest complete unit of an element COMPOSED OF THREE MAIN PARTS: 1. Protons: positive electrical charge 2. Neutrons: no electrical charge 3. Electrons: negative electrical charge CHAPTER 5 CHEMISTRY | MATTER | ELEMENTS ATOMS Chemical behavior of atoms depends mostly on number of electrons in the outer shell Hydrogen • Simplest atomic structure • 1 proton and 1 electron • Atomic number of 1 Positive Proton Negative Proton HYDROGEN ATOM (H) CHAPTER 5 CHEMISTRY | MATTER | ELEMENTS MOLECULES Two or more atoms joined together by a chemical bond TWO HYDROGEN ATOMS, EACH WITH ONE ELECTRON ONE OXYGEN ATOM AND ITS EIGHT ELECTRONS CHAPTER 5 CHEMISTRY | MATTER | ELEMENTS THE RESULT IS H2O MOLECULES • With an element, the atoms are the SAME • With a compound, the atoms are DIFFERENT CHAPTER 5 CHEMISTRY | MATTER | ELEMENTS CHEMICAL BONDS Amino Acids: compounds consisting of carbon, oxygen, hydrogen and nitrogen CHAPTER 5 CHEMISTRY | MATTER | CHEMICAL BONDS AMINO ACIDS Hair: form of protein called keratin Hair is made of 97% keratin protein and 3% trace minerals CHAPTER 5 CHEMISTRY | MATTER | CHEMICAL BONDS AMINO ACIDS Peptide Bonds (End Bonds): formed when two amino acids are positioned end-to-end causing acid end of one to attach to amino end of another • Amino acids that create protein are linked together by a peptide bond • Hair is the linking together of protein groups It’s very important not to disturb peptide bonds – combining alkaline chemicals and heat could break these critical peptide bonds and destroy the protein structure. CHAPTER 5 CHEMISTRY | MATTER | CHEMICAL BONDS AMINO ACIDS FOUR SIDE BONDS 1. Hydrogen Bond 2. Salt Bond 3. Disulfide Bond 4. Van der Waal’s Forces CHAPTER 5 CHEMISTRY | MATTER | CHEMICAL BONDS AMINO ACIDS FOUR SIDE BONDS 1. Hydrogen Bond • Works on principle that unlike charges attract • Can easily be broken by heat or water • Accounts for 35% of hair’s strength due to millions of hydrogen bonds in hair’s structure CHAPTER 5 CHEMISTRY | MATTER | CHEMICAL BONDS AMINO ACIDS FOUR SIDE BONDS 2. Salt Bond • Result of attraction of unlike charges; the negative charge in one amino acid grouping attracts the positive charge in another • Accounts for 35% of hair’s resistance to change CHAPTER 5 CHEMISTRY | MATTER | CHEMICAL BONDS AMINO ACIDS FOUR SIDE BONDS 3. Disulfide Bond • Results when sulfur-type side chains join with other sulfur-type side chains • Most important bond to cosmetology • Broken or reformed by chemical services, producing a chemical change with lasting results CHAPTER 5 CHEMISTRY | MATTER | CHEMICAL BONDS AMINO ACIDS FOUR SIDE BONDS 4. Van der Waal’s Forces • Based on theory that atomic groups prefer environment with other groups that have similar structures • Not important for cosmetology services other than to know that it exists and plays a role in bonding protein chains CHAPTER 5 CHEMISTRY | MATTER | CHEMICAL BONDS AMINO ACIDS 1. Hair begins with individual atoms, the smallest unit of matter 2. Atoms unite by sharing electrons to become molecules of amino acids CHAPTER 5 CHEMISTRY | MATTER | CHEMICAL BONDS AMINO ACIDS 3. The amino acids create polypeptide protein chains 4. The ends of the amino acids bond to form peptide bonds 5. The bonding of protein chains to other protein chains makes human hair CHAPTER 5 CHEMISTRY | MATTER | CHEMICAL BONDS SELF-CHECK On a sheet of paper numbered 1-8, answer the following questions. 1. Anything that occupies space existing as a solid, liquid or gas is termed __________. 2. All of the following are elements that form the basis of hair, nails and skin EXCEPT: a. sulfur b. helium c. carbon d. oxygen CHAPTER 5 CHEMISTRY | MATTER | SELF-CHECK SELF-CHECK 3. T or F Atoms have a nucleus containing protons and electrons. 4. The chemical behavior of atoms depends mostly on the number of __________ in the outer shell. CHAPTER 5 CHEMISTRY | MATTER | SELF-CHECK SELF-CHECK Match the term with the best description. 5. __ Peptide bond a. Negative charge in one amino acid grouping attracts the positive charge in another 6. __ Hydrogen bond 7. __ Salt bond b. Formed when acid end of one amino 8. __ Disulfide bond acid attaches to amino end of another c. Hydrogen atom in one molecule attracted to atom of another molecule with negative electrons d. Most important bond to a salon professional’s work CHAPTER 5 CHEMISTRY | MATTER | SELF-CHECK SELF-CHECK On a sheet of paper numbered 1-8, answer the following questions. 1. Anything that occupies space existing as a solid, liquid or matter gas is termed __________. 2. All of the following are elements that form the basis of hair, nails and skin EXCEPT: a. sulfur b. helium c. carbon d. oxygen CHAPTER 5 CHEMISTRY | MATTER | SELF-CHECK SELF-CHECK 3. T or F Atoms have a nucleus containing protons and electrons. Protons and neutrons are packed together tightly to form the nucleus. Electrons move about the nucleus on orbiting paths. 4. The chemical behavior of atoms depends mostly on the electrons in the outer shell. number of __________ CHAPTER 5 CHEMISTRY | MATTER | SELF-CHECK SELF-CHECK Match the term with the best description. b Peptide bond 5. __ a. Negative charge in one amino acid grouping attracts the positive charge in another c Hydrogen bond 6. __ a Salt bond 7. __ b. Formed when acid end of one amino d Disulfide bond 8. __ acid attaches to amino end of another c. Hydrogen atom in one molecule attracted to atom of another molecule with negative electrons d. Most important bond to a salon professional’s work CHAPTER 5 CHEMISTRY | MATTER | SELF-CHECK FACE THE FACTS MATTER Defined as anything that occupies space ELEMENTS The five elements found in the hair are carbon, oxygen, hydrogen, nitrogen and sulfur Atoms are the smallest complete unit of an element and consist of protons, neutrons and electrons CHAPTER 5 CHEMISTRY | MATTER | FACE THE FACTS FACE THE FACTS Protons and neutrons located in nucleus A molecule is two or more atoms joined by chemical bond CHEMICAL BONDS Hair is a form of protein called keratin Peptide bond forms when two amino acids are positioned end-to-end causing the acid end of one to attach to amino end of another CHAPTER 5 CHEMISTRY | MATTER | FACE THE FACTS FACE THE FACTS CHEMICAL BONDS Hydrogen bonds give hair about 35% of its strength Salt bonds are result of attraction of unlike charges and account for 35% of hair’s strength Disulfide bond is most important to a salon professional’s work since many chemical services break or reform this bond into new shape CHAPTER 5 CHEMISTRY | MATTER | FACE THE FACTS 5.2 THE pH SCALE CHAPTER 5 CHEMISTRY | THE pH SCALE | ADVANCE ORGANIZER THE pH SCALE pH (Potential Hydrogen): unit of measurement that indicates whether a substance is acidic, neutral or alkaline • Measures the amount of acid or alkali in a water-based solution CHAPTER 5 CHEMISTRY | THE pH SCALE THE pH SCALE ACIDIC SOLUTION more positive hydrogen ions than negative hydroxide ions NEUTRAL SOLUTION equal number of positive and negative ions CHAPTER 5 CHEMISTRY | THE pH SCALE ALKALINE SOLUTION More negative hydroxide ions than positive hydrogen ions THE pH SCALE • Ranges from 0 to 14 with number 7 as neutral • Numbers less than seven indicate acid • Numbers greater than seven indicate alkaline The scale is logarithmic, which means each step or number increases by multiples of 10 CHAPTER 5 CHEMISTRY | THE pH SCALE THE pH SCALE ACID BALANCED • Means pH is between 4.5 to 5.5 • Is the term applied to most professional shampoos Acid Balanced CHAPTER 5 CHEMISTRY | THE pH SCALE SELF-CHECK On a sheet of paper numbered 1-7, answer the following questions. 1. T or F The pH scale ranges from 0 to 14 with numbers less than 7 indicating alkaline. 2. Distilled water has equal numbers of hydroxide ions and hydrogen ions causing it to be __________. 3. An acidic solution contains more __________ ions than __________ ions. 4. An alkaline solution contains more __________ ions than __________ ions. CHAPTER 5 CHEMISTRY | THE pH SCALE | SELF-CHECK SELF-CHECK Match the term with the best description. 5. __ Acidic solution a. pH value of approximately 7 6. __ Alkaline solution b. pH values less than 7 7. __ Neutral solution c. pH values greater than 7 CHAPTER 5 CHEMISTRY | THE pH SCALE | SELF-CHECK SELF-CHECK On a sheet of paper numbered 1-7, answer the following questions. 1. T or F The pH scale ranges from 0 to 14 with numbers less than 7 indicating alkaline. 2. Distilled water has equal numbers of hydroxide ions neutral and hydrogen ions causing it to be __________. hydrogen ions 3. An acidic solution contains more __________ hydroxide ions. than __________ hydroxide ions 4. An alkaline solution contains more __________ hydrogen ions. than __________ CHAPTER 5 CHEMISTRY | THE pH SCALE | SELF-CHECK SELF-CHECK Match the term with the best description. b Acidic solution 5. __ a. pH value of approximately 7 c Alkaline solution 6. __ b. pH values less than 7 a Neutral solution 7. __ c. pH values greater than 7 CHAPTER 5 CHEMISTRY | THE pH SCALE | SELF-CHECK FACE THE FACTS THE pH SCALE Unit of measurement that indicates whether substance is acidic, neutral or alkaline Ranges from 0 to 14; below 7 is acid; above 7 is alkaline; 7 is neutral Logarithmic, each step or number increases by multiples of 10 Acid balanced means the pH is in the acid range of 4.5 to 5.5 CHAPTER 5 CHEMISTRY | THE pH SCALE | FACE THE FACTS 5.3 CHEMISTRY OF COSMETICS COSMETIC CLASSIFICATIONS SHAMPOOS RINSES AND CONDITIONERS PERMS RELAXERS CURL REFORMATION HAIR COLOR PRODUCT INFORMATION CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | ADVANCE ORGANIZER COSMETIC CLASSIFICATIONS Six classifications categorize cosmetics used in the cosmetology industry: 1. SOLUTIONS 2. SUSPENSIONS 3. EMULSIONS 4. OINTMENTS 5. SOAPS 6. POWDERS CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | COSMETIC CLASSIFICATIONS SOLUTIONS Solution: mixture of two or more kinds of evenly dispersed molecules Solute: any substance that dissolves into a liquid and forms a solution Solvent: substance that is able to dissolve another substance Mixture: two or more substances that are physically combined CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | COSMETIC CLASSIFICATIONS SOLUTIONS Water is considered a universal solvent because it is capable of dissolving more substances than any other solvent. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | COSMETIC CLASSIFICATIONS SUSPENSIONS Mixture of two or more molecules that separate when left standing and need to be shaken before use. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | COSMETIC CLASSIFICATIONS EMULSIONS Formed when two or more nonmixable substances are united by binder or gum-like substance. Oil-in-water Water-in-oil Perm Solutions Cold Creams Immiscible = liquids not able to be mixed Miscible = liquids able to be mixed together without separating CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | COSMETIC CLASSIFICATIONS OINTMENTS Mixtures of organic substances and a medicinal agent; usually found in semisolid form. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | COSMETIC CLASSIFICATIONS SOAPS Mixtures of fats and oils converted to fatty acids by heat and then purified. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | COSMETIC CLASSIFICATIONS POWDERS Equal mixtures of inorganic and organic substances that do not dissolve in water. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | COSMETIC CLASSIFICATIONS SHAMPOOS Shampoos clean scalp and hair to remove foreign matter without adversely affecting scalp or hair. Shampooing should be a soothing, relaxing experience, as it sets the climate for all future services. Improper cleansing allows a breeding place for diseasecausing bacteria and can lead to scalp disorders and even hair loss. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SHAMPOOS HOW SHAMPOO WORKS Surfactants: cleansing agents used to remove oil from hair • Consist of two parts 1. Water-Loving Part (Hydrophilic) 2. Oil-Loving Part (Lipophilic) • Cause oil to “roll up” into droplets, which are lifted into water and washed away CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SHAMPOOS THE ROLE OF WATER Hard water contains certain salts and metals that prevent shampoo from lathering Soft water contains small amounts of minerals and is preferred because it lathers freely CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SHAMPOOS THE ROLE OF WATER Two methods used in purification of water: 1. Sedimentation: undesirable substances sink to the bottom 2. Filtration: undesirable substances pass through a porous substance CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SHAMPOOS TYPES OF SHAMPOO ALL-PURPOSE SHAMPOOS • Contain low alkaline content and low concentration of surface active agents • Do not strip color and are very mild ACID-BALANCED (NON-STRIPPING) SHAMPOOS • Formulated to have same pH as hair and skin and can be used on all types of hair PLAIN SHAMPOOS • Contain high alkaline soap base and are usually strong • Not recommended for chemically treated or damaged hair CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SHAMPOOS TYPES OF SHAMPOO SOAPLESS SHAMPOOS • Lather without harsh alkaline ingredients • Are effective in both soft and hard water • Rinse out easily MEDICATED SHAMPOOS • Designed to treat scalp and hair problems CLARIFYING SHAMPOOS • Use higher alkalinity in order to remove residue such as product buildup, dirt, etc. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SHAMPOOS TYPES OF SHAMPOO ANTI-DANDRUFF SHAMPOOS • Formulated for either dry or oily scalp • Contain an anti-fungus or germicide LIQUID DRY SHAMPOOS • Cleanse scalp and hair when the client is unable to receive normal shampoo • Effective in cleaning wigs and hairpieces CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SHAMPOOS TYPES OF SHAMPOO POWDER DRY SHAMPOOS • Formulated for clients who are bedridden • Contain orris root powder that absorbs soil and oil as the product is brushed through the scalp and hair • Do not apply prior to a chemical service CONDITIONING SHAMPOOS • Contain small amounts of animal, vegetable additives that penetrate the cortex or coat the cuticle layer CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SHAMPOOS TYPES OF SHAMPOO COLOR SHAMPOOS • Contain temporary color molecules that adhere to outer cuticle of the hair and deposit color SHAMPOOS FOR THINNING HAIR • May contain ingredients to provide a healthy environment for the maximum amount of hair growth CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SHAMPOOS RINSES AND CONDITIONERS • COSMETIC APPEARANCE is luster or shine of the hair • POROSITY is amount of moisture, liquids or chemicals hair can absorb • MANAGEABILITY is how easily a comb can pass through hair • ELASTICITY is ability of hair to stretch and return to natural shape without breaking CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | RINSES AND CONDITIONERS RINSES • Affect mostly surface of the hair • Applied to help close cuticle and make hair feel soft and manageable CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | RINSES AND CONDITIONERS RINSES VINEGAR AND LEMON (ACID) RINSES • Keep cuticle compact • Dissolve soap scum, untangle and separate hair and add sheen CRÈME RINSES • Soften and add luster • Slightly acidic MEDICATED RINSES • Control minor dandruff and scalp conditions CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | RINSES AND CONDITIONERS CONDITIONERS Penetrate deep into hair to fortify damaged areas and protect from further damage INSTANT CONDITIONERS • Coat hair shaft and restore moisture and oils • Do not penetrate cortex or replace keratin in shaft NORMALIZING CONDITIONERS • Contain a vegetable protein • Have an acidic pH causing the cuticle to close after alkaline chemical service CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | RINSES AND CONDITIONERS CONDITIONERS BODY-BUILDING CONDITIONERS • Penetrate damaged hair shaft and deposit proteins into cortex • May be used prior to chemical services to strengthen hair CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | RINSES AND CONDITIONERS CONDITIONERS MOISTURIZING CONDITIONERS • Recommended for dry, brittle hair • Contain humectants that penetrate into hair shaft to bind and hold moisture CUSTOMIZED CONDITIONERS • Formulated to meet special needs of certain clients • Mixing moisturizing conditioner with body-building protein product to improve the condition of client’s hair is an example CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | RINSES AND CONDITIONERS PERMS Allow hair designers to chemically reform hair into wavy or curly formation. ORIGINAL STRAIGHT HAIR SHIFTING AND BREAKING OF DISULFIDE BONDS CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | PERMS DISULFIDE BONDS REFORMED PERMS 1. ALKALINE WAVES (COLD WAVES) • Process without heat • pH of 8.0 – 9.5 2. ACID WAVES (HEAT WAVES) • Process with heat • Wrapped with tension • pH of 6.9 – 7.2 CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | PERMS ALKALINE WAVES • Main ingredient found in alkaline waves is thioglycolic acid or its derivatives and ammonium hydroxide • Ammonium hydroxide is added to formula to shorten processing time and cause hair swelling • Processing begins as soon as chemical is applied to hair CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | PERMS ACID WAVES • Main ingredient found in acid waves is glyceryl monothioglycolate • More controlled curl and less damage to hair • Heat sometimes used to assist penetration of hair structure NEUTRALIZER • Main ingredient is either hydrogen peroxide, sodium perborate or sodium bromate CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | PERMS RELAXERS Reduce curl in excessively curly or wavy hair by changing molecular structure Reforming (Relaxing) Product: holds hair in straight position while being processed; in addition smoothing or pressing action is applied Neutralizing Step: utilizes neutralizing shampoo or lotion; reduces swelling and causes hair to be held in straight configuration CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | RELAXERS RELAXERS Two popular types of products used to chemically relax hair: 1. Sodium Hydroxide – 2% to 3% sodium hydroxide in heavy cream base with pH from 11.5 to 14 2. Ammonium Thioglycolate – 4% to 6% thioglycolic acid; pH 8.5 to 9.5 CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | RELAXERS CURL REFORMATION Service used to loosen the texture of overly curly to tightly curled hair 1. Thioglycolate-based product is applied 2. Hair is smoothed using back of comb and fingers 3. Thioglycolate product is rinsed from hair when straightened shape is achieved 4. Curl booster is applied along with perm rods to achieve curl formation 5. When test curl shows desired curl formation hair is rinsed 6. Neutralizing lotion is applied to reform (fix) curl in lasting shape CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | CURL REFORMATION HAIR COLOR GENERAL CATEGORIES • Nonoxidative Color • Oxidative Color • Lighteners • Developers • Vegetable, Metallic and Compound Dyes CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR HAIR COLOR Oxidants (Developers): products that have ability to release oxygen, which is needed for chemical change Oxidative colors are mixed with an oxidant (developer) such as hydrogen peroxide Nonoxidative colors are used straight from the bottle Oxidation: process where substance loses electron and oxygen is acquired Reduction: process where substance gains electron and oxygen is released CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR NONOXIDATIVE COLORS TEMPORARY COLORS: nonreactive, direct dyes that coat the surface of hair shaft • Certified colors • Accepted by government for use in foods, drugs and cosmetics • Only last until shampooed out CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR NONOXIDATIVE COLORS SEMI-PERMANENT COLORS: dye molecules in a solution that are able to penetrate cuticle layer versus coating • Slightly more alkaline in pH than temporary colors • Used straight from the bottle; not mixed with oxidants • Last through several shampoos CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR OXIDATIVE COLORS LONG-LASTING SEMI-PERMANENT COLORS: use low volume peroxide to develop color molecules and aid in color depositing • Add color to hair; cannot lift or lighten • Available in liquid, cream and gel CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR OXIDATIVE COLORS PERMANENT COLORS: penetrate cuticle and cortex, remain in hair until removed by chemical means or hair grows out and is cut off • Use oxidation system that starts out with colorless molecules that combine with peroxide resulting in chemical reaction that builds colored molecules • Can lighten natural color or deposit artificial color CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR LIGHTENERS Bleaching or decolorizing • Involves oxidation of natural melanin in hair; causes several color changes as pigment disperses and lightens hair to new level • Uses peroxide and alkaline product such as ammonia • Mix with peroxide immediately before application because only then is oxidation at full strength CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR LIGHTENERS 1. On-the-scalp lighteners (oil and cream) • Use ammonia to give high lift • Contain conditioners • Mild enough to apply directly on the scalp • pH about 9 2. Off-the-scalp lighteners (powder bleaches) • Stronger and faster than oil or cream lighteners • Can irritate scalp (burns and blisters) • pH about 10.3 CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR DEVELOPERS HYDROGEN PEROXIDE (H202): most common developer • Most often used strength is 20-volume • Comes in clear, cloudy, creamy and gel forms • Has pH between 2.5 and 4.5 • Requires storage in a cool, dry place, shelf life of 3 years CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR VEGETABLE, METALLIC AND COMPOUND DYES Less professional category of hair color; the more these colors are used the more color change takes place HENNA • Is an example of a vegetable dye • Produces reddish highlights if used in purest form • Allows hair to grow completely out before any chemical service CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR VEGETABLE, METALLIC AND COMPOUND DYES Pure metallic dyes • Incompatible with other chemical services • Fade into unnatural shades depending on metal used Compound dyes are a combination of a vegetable and metallic dye CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | HAIR COLOR PRODUCT INFORMATION MATERIAL SAFETY DATA SHEETS: contain special information about products from manufacturer Additional information resources are: • Federal Drug Administration (FDA) • United States Pharmacopeia (U.S.P.) • International Cosmetic Ingredient Dictionary CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | PRODUCT INFORMATION COSMETIC INGREDIENTS • Ingredients listed on product label are in order of concentration with largest amount listed first • More than 5,000 different ingredients are used by cosmetics industry CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | PRODUCT INFORMATION SELF-CHECK On a sheet of paper numbered 1-17, answer the following questions. 1. T or F Surfactants are used to remove oil from the hair. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK Match the term with the best description. 2. __ All-Purpose Shampoos 3. __ “Plain” Shampoos 4. __ Medicated Shampoos 5. __ Anti-Dandruff Shampoos 6. __ Powder Dry Shampoos a. For clients who are bedridden and cannot wet hair b. Contain alkaline, not recommended for chemically treated hair c. Cleanse hair without correcting any special condition d. Formulated for either a dry or oily scalp e. Contain ingredients designed to treat scalp and hair problems or disorders CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK 7. Which of the following rinses leaves the hair with a soft feel by adhering to the hair shaft and is only slightly acidic? a. lemon b. creme c. vinegar d. medicated 8. Products that fortify damaged areas of hair and protect against further damage from chemical services or heat are called __________. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK 9. All of the following statements regarding perms are true EXCEPT: a. perms allow hair designers to chemically reform hair b. two primary categories of perms are alkaline waves and acid waves c. main chemical ingredient found in alkaline waves is glyceryl monothioglycolate d. main ingredient found in most neutralizers is either hydrogen peroxide, sodium perborate, or sodium bromate CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK 10. Sodium hydroxide and ammonium thioglycolate are the products called __________ that reduce curl in excessively curly hair by changing its molecular structure. 11. A soft curl perm loosens the texture of overly curly hair by: a.using a low volume peroxide b.using a thioglycolate-based product c.rinsing the sodium hydroxide relaxer with disulfide d.following a thioglycolic relaxer with a sodium hydroxide relaxer CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK Match the term with the best description. 12. __ Nonoxidative Colors a. Referred to as decolorizing and involves oxidation of natural melanin in the hair b. Less professional category of hair color c. Not mixed with oxidants and used straight from the bottle d. Mixed with an oxidant such as hydrogen peroxide e. Most common agent is hydrogen peroxide 13. __ Oxidative Colors 14. __ Lightening 15. __ Developers 16. __ Vegetable, Metallic and Compound Dyes CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK 17. When you read a product label, the ingredients are listed in order of their ______________. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK On a sheet of paper numbered 1-17, answer the following questions. 1. T or F Surfactants are used to remove oil from the hair. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK Match the term with the best description. 2. c All-Purpose Shampoos __ 3. b “Plain” Shampoos __ 4. e Medicated Shampoos __ 5. d Anti-Dandruff Shampoos __ 6. a Powder Dry Shampoos __ a. For clients who are bedridden and cannot wet hair b. Contain alkaline, not recommended for chemically treated hair c. Cleanse hair without correcting any special condition d. Formulated for either a dry or oily scalp e. Contain ingredients designed to treat scalp and hair problems or disorders CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK 7. Which of the following rinses leaves the hair with a soft feel by adhering to the hair shaft and is only slightly acidic? a. lemon b. creme c. vinegar d. medicated 8. Products that fortify damaged areas of hair and protect against further damage from chemical services or heat conditioners are called __________. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK 9. All of the following statements regarding perms are true EXCEPT: a. perms allow hair designers to chemically reform hair b. two primary categories of perms are alkaline waves and acid waves c. main chemical ingredient found in alkaline waves is glyceryl monothioglycolate d. main ingredient found in most neutralizers is either hydrogen peroxide, sodium perborate, or sodium bromate CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK 10. Sodium hydroxide and ammonium thioglycolate are the relaxers that reduce curl in products called __________ excessively curly hair by changing its molecular structure. 11. A soft curl perm loosens the texture of overly curly hair by: a.using a low volume peroxide b.using a thioglycolate-based product c.rinsing the sodium hydroxide relaxer with disulfide d.following a thioglycolic relaxer with a sodium hydroxide relaxer CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK Match the term with the best description. 12. c Nonoxidative Colors __ a. Referred to as decolorizing and involves oxidation of natural melanin in the hair b. Less professional category of hair color c. Not mixed with oxidants and used straight from the bottle d. Mixed with an oxidant such as hydrogen peroxide e. Most common agent is hydrogen peroxide d Oxidative Colors 13. __ a Lightening 14. __ e Developers 15. __ b Vegetable, Metallic 16. __ and Compound Dyes CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK SELF-CHECK 17. When you read a product label, the ingredients are concentration listed in order of their ______________. CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | SELF-CHECK FACE THE FACTS COSMETIC CLASSIFICATIONS Six classifications: solutions, suspensions, emulsions, ointments, soaps, and powders SHAMPOOS Contain surfactants that have water-loving part (hydrophilic) and oil-loving part (lipophilic) CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | FACE THE FACTS FACE THE FACTS RINSES AND CONDITIONERS Crème rinses adhere to hair shaft leaving hair with a soft feel Conditioners fortify damaged areas of the hair and protect it against further damage from chemical services or heat PERMS Fall into two categories, alkaline waves and acid waves, and allow hair designers to chemically reform hair into a wavy or curly formation CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | FACE THE FACTS FACE THE FACTS RELAXERS Reduces curl in excessively curly or wavy hair by changing its molecular structure CURL REFORMATION Uses thioglycolate-based products to relax overly curly hair and then perm hair to achieve new curl formation HAIR COLOR Nonoxidative colors are not mixed with oxidants and are used straight from the bottle Oxidative colors are mixed with hydrogen peroxide CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | FACE THE FACTS FACE THE FACTS Lightening is also referred to as bleaching or decolorizing and involves oxidation of the natural melanin in hair Hydrogen peroxide is most common developer used in hair coloring and hair lightening PRODUCT INFORMATION When you read a product label, the ingredients are listed in the order of their concentration CHAPTER 5 CHEMISTRY | CHEMISTRY OF COSMETICS | FACE THE FACTS LESSONS LEARNED The bonding of protein chains to other protein chains makes human hair The pH scale indicates whether a substance is acidic, neutral or alkaline to assist professionals in keeping the hair, skin and scalp in the best condition possible Knowledge of the six classifications of cosmetics helps professionals understand product labels and usage directions CHAPTER 5 CHEMISTRY | LESSONS LEARNED SELF-TEST CHAPTER 5 CHEMISTRY | SELF-TEST