Remove contaminated clothing, including any leather items such as watch bands or belts. Support document . The phenolic resins contain basically p - t -amylphenol, p - t -butylphenol, p -nonylphenol, mixed cresols, and also used cashew nutshell liquid ( Fig. Density 11. 2. A good practice is to use a heavy weight disposable (0.2 mm; 8 mil) and double glove. Submicroscopic particles that infect cells of a biological organism are known as ___. ---------------------------------------------------------------------------------------------------------------------------, 8. supplier lists. The plastics industry begins with the development of the first thermoset plastics by Baekeland in 1909. shannon medical center cafeteria menu; aerosol cans under pressure if not handled properly; pros and cons of cold calling in the classroom; western iowa tech community college staff directory OSHA's Personal Protective Equipment guidance document, Environmental Protection Agency (Guidance for pesticide use), Cole-Palmer Instrument Co. Safety Glove Chemical Compatibility Database, NIOSH Alert: Preventing Allergic Reactions to Natural Latex Rubber in the Workplace (June 1997), NIOSH Recommendations for Chemical Protective Clothing, Temperature extremes, cryogenic properties, Physical hazards (sharps, piercing objects), The infectious potential of biological hazards, Accidental overspray from a dispensing device, Handling infectious agents that require barrier protection. Phenol can be a component in a commercial reagent (e.g. Do not interrupt flushing. justin rogers obituary mississippi; mcarthur golf club owners; list of walgreens stores closing by state; how did tiler peck and tommy dunn meet; batch convert heic to jpg photoshop Flammability 12. But the addition of resins and reinforcing fillers . Phenolic resins totaling 2.4 billion pounds went into the adhesive and bonding markets in 1993 (Table 2.3); this increased to more than 3.5 billion pounds in 2004, making the adhesive and bonding market the largest outlet for phenolic resins.It is arguable that the adhesive and bonding market includes the composite wood and laminating applications because phenolic resin is the bonding material . damage All Disinfectants in the presence of oils, lotions, creams, or dust are? Rips or punctures before and after each use, Signs of degradation (change in color or texture). All of these materials must be routinely demonstrated to be free from interferences under the conditions of the analysis by running laboratory The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. Poor for gasoline and aliphatic, aromatic, and halogenated hydrocarbons. June 21, 2022 phenols may certain rubber and plastic materials . Stay up to date on industry news and trends, product announcements and the latest innovations. Privacy Statement and Easily moulded into different shapes and sizes. Website Last Modified March 4, 2023. The Environmental Protection Agency (EPA) registers many different types of ___. Group A plastics not otherwise classified are included in this class. It may also be very irritating to skin and eyes. QIAzol, TRIzol) or prepared as part of a mixture in the laboratory (e.g. Discard the pad. The molecular structure of plastic will be maintained. Pus-forming bacteria that grow in bunches or clusters are ___. Natural rubber . Ms informacin en nuestra. Many other models are commercially available in each glove category. Quats is a short term for the salon disinfectant known as ___. Break down food . Good insulation and low thermal . TiO 2 types, darkness, moisture, higher pH . With novolacs, hexamine is often added to assist in cross-linking. But industry groups have sought to capitalize on health concerns, arguing that plastics are essential in the effort to stop the spread of this virus.. Label both the bag and the small zip-lock bag for collecting the used gauze wipes as Hazardous Waste Phenol Contamination. Will Byers Crying Fanfiction, Many articles like chairs, tables, buckets, toys, balls, etc are made of plastic material. Klimatyzacja Szczecin , monta , serwis ,czyszczenie i odgrzybianie klimatyzacji, naprawa, ogrzewanie nadmuchowe, Rheem, Fujitsu, Lg , Gree, monta klimatyzacji szczecin, HVAC. Rubber extrusion is a downstream process that involves compounding, heating, kneading, pressurizing, extrusion, and vulcanizing. Bakelite is made from Phenol formaldehyde. 2.color of flame 3.Odor 4.Does the material drip while burning 5.Nature of smoke and color of smoke. Recommendations are that laboratories working with phenol use polyethylene glycol 300 or 400 (PEG-300 or PEG-400), rather than water, for immediate first aid treatment of dermal exposures. ALWAYS wash your hands after removing gloves. 17:95-104. Rubber flooring is flooring made from either natural tree rubber or recycled rubber from vehicle tires. 5. . Mounting material. The kit should be located in a visible area where the phenol work is being done (for instance, in the fume hood), or nearby with the location clearly posted. Phenols may cause (blank) to certain rubber or plastic materials. The Glove Selection Chart also provides advantages and disadvantages for specific glove types. Latices include a binder dispersed in the water and form films by fusion of the plastic particles as the water evaporates. The gloves demonstrated below (Viton Butyl) may be purchased from VWR, and although they are more expensive than nitrile, they may be reused after incidental contact (always inspect them before use and discard if holes are evident or contamination is apparent). It is both a corrosive (can cause severe burns) and toxic (absorbed phenol acts as a systemic toxin). Table 2.3 shows the major phenol producers in the world. A contagious skin disease caused by the itch mite is ___. 1 The following five . It can cause permanent eye injury, blindness and scarring. to plastic layers in multi-material multi-layers. . bickenhill tip booking; merchiston castle school term dates Wood is extremely porous and therefore difficult to disinfect. Type. and miscellaneous information useful to a rubber compounder. Put another way, discoloration (pink, yellow, peach and even turquoise) results from the presence of over-oxidized phenols. The Week in Photos: California exits pandemic emergency amid a winter landscape, Look up: The 32 most spectacular ceilings in Los Angeles, Winter storms ease drought conditions in California, report shows, 19 cafes that make L.A. a world-class coffee destination, Calmes: Heres what we should do about Marjorie Taylor Greene, David Lindley, guitarist best known for work with Jackson Browne, dies at 78, This fabled orchid breeder loves to chat just not about Trader Joes orchids, Column: Did the DOJ just say Donald Trump can be held accountable for Jan. 6? Phenols may cause (blank) to certain rubber or plastic materials. phenols may certain rubber and plastic materialsapplebee's ashland menu. Dielectric strength 10. household bleach. phenols may certain rubber and plastic materials. On January 20, 2015, China's National Health and Family Planning Commission (NHFPC) published an amendment to the current Hygienic Standards for Uses of Additives in Food Containers and Packaging Materials (GB 9685-2008) for comments from the general public. Support document . 6.23 ). The key revisions to the Standard are detailed below. You can use this space to go into a little more detail about your company. Novotext or Tufnol:This type of phenolic resin is reinforced with cotton or linen fibers and is often used in applications as a liner in loaded bearings, because it has low-friction. inactivated An infectious agent, smaller than bacteria. Following are the properties of plastics- 1. Some retailers, including Starbucks, have stopped allowing customers to bring in reusable cups, containers or shopping bags, fearing they could be vectors for the coronavirus. Environmental groups warn that all that material though potentially life-saving could overwhelm cities around the world where waste collection and recycling strategies have been short-circuited by lockdowns. These early plastics were named Bakelite in honor of their discoverer. On January 20, 2015, China's National Health and Family Planning Commission (NHFPC) published an amendment to the current Hygienic Standards for Uses of Additives in Food Containers and Packaging Materials (GB 9685-2008) for comments from the general public. 3.1 Method interferences may be caused by contaminants in solvents, reagents, glassware, and other sample processing hardware that lead to discrete artifacts and/or elevated baselines in gas chromatograms. by highpiledstorage | Nov 30, 2019 | Commodities. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Examples: Aerosol, Level 3. The Triangle class must adhere to this rule. Glove colors and appearances will vary. 325211 Plastic Material and Resin Manufacturing 325212 Synthetic Rubber Manufacturing 325992 Photographic Film Paper, Plate . Natural Rubber: Natural rubber is an elastic material present in the latex of certain plants. Phenolic material is typically available in a range of geometries, including phenolic sheets, tubes, rods, profiles, slabs, specific shapes and blocks. However, autoclaving can further weaken the strength of plastic material particularly for already weaker plastics. Impact strength 2. capable of replication through taking over the host cells reproduction. . Continue to gently wipe skin (do not scrape or irritate the effected skin area) with polyethylene glycol soaked gauze pads until no odor of phenol remains, changing the gauze pad frequently. It is also available as foam, which is typically used in insulation applications. as shown in figure 1, generally plastics manufacturing processes consist of: adding chemical additives to the plastic resin to achieve appropriate material characteristics, such as stability, flexibility, durability, and flame retardancy; converting raw plastic materials in the form of pellets, granules, powders, sheets, fluids, . Once selected, glove use requirements for your lab should be posted in your Chemical Hygiene Plan flipchart under theStandard Operating Procedures section. One very useful group of materials formed from the reaction of phenol and formaldehyde is known as phenolic resins. ARMY SUBSTANCE ABUSE PROGRAM Lets make sure its temporary, The tiny plastic packages that are fueling Asias waste crisis, Arizona governor wont proceed with execution set by court, Civilians flee embattled town of Bakhmut as Ukrainian pullout looms. Sodium Hypochlorite is also known as ___. phenols may certain rubber and plastic materials KLIMATYZACJA-SERWIS-SZCZECIN Klimatyzacja Szczecin , monta , serwis ,czyszczenie i odgrzybianie klimatyzacji, naprawa, ogrzewanie nadmuchowe, Rheem, Fujitsu, Lg , Gree, monta klimatyzacji szczecin, HVAC As previously mentioned, glassware and plastics are generally safe for autoclaving. Note: Never dip gloves directly into liquid nitrogen. All rights reserved much weaker as acids than common carboxylic acids (phenol has pKa = 9.88). Do Not Sell or Share My Personal Information, Texas congressman who broke with GOP is censured, Hong Kong court convicts activists behind Tiananmen vigil, Election conspiracies fuel dispute over voter fraud system, Desperate mountain residents trapped by snow beg for help; We are coming, sheriff says, Newsom, IRS give Californians until October to file tax returns, Californias snowpack is approaching an all-time record, with more on the way. Thailand, which had banned disposable plastic bags at major stores in January and planned to slash plastic waste in 2020, now expects to see it rise by as much as 30%. Materials to avoid. Background. Laboratories that use phenol are advised to assemble a kit for first aid treatment of dermal exposure. Phenol is famous as a precursor to many materials and useful compounds such as phenolic resins, plastics, and related materials. Following are the properties of plastics- 1. between the odor of the materials used in the match and the odor given off by burning plastic materials. Create the IllegalTriangleException class, and modify the constructor of the Triangle class to throw an IllegalTriangleException object if a triangle is created with sides that violate the rule, as follows: /** Construct a triangle with the specified sides */ public Triangle(double side1, double side2, double side3) throws IllegalTriangleException { // Implement it }. Standard. Sleeves are also available to provide protection to wrists and forearms. Use these additional resources for information on specific chemicals or glove materials. Its almost just an excuse for going back and using plastic on everything.. Esthetics: Milady Chapter 1 109 terms SALONMARETRAINING Milady Chapter5 119 terms bpruitt123 Milady Chapter 3 Esthetics- Your Professional Image 34 terms SALONMARETRAINING We suggest the use alkyl derivatives of phenols, applied in synthetic rubber industry, plastic industry and elastomers industry, as extractants (Bukin et al. Class III commodities are commodities of wood, paper, natural fiber cloth, or Group C plastics or products thereof, with or without pallets. Group A plastics not otherwise classified are included in this class. Food contact materials. Due to the ease and diversity of reactions, there are many products manufactured from phenols. EH&S provides guidance and services to the campus community that promote health, safety, and environmental stewardship. It was the plastics industry that offered recycling as a solution. Damage Sodium hypochlorite is also known as Household bleach THIS SET IS OFTEN IN FOLDERS WITH. Phenol can damage plastic and rubber and can cause certain metals to rust. The coronavirus pandemic has brought a dramatic increase in the use of plastic, the main component in masks, gloves, hand sanitizer bottles, protective medical suits, test kits, takeout containers, delivery packaging and other items central to our new, locked-down, hyper-hygienic way of life. Pus-forming bacteria that grow in curved lines resembling a string of beads are known as ___. powerful tuberculocidal disinfectants. 2019 Triad Fire Consultants, Inc. All rights reserved. Ed Begley Jr Parkinson's, Copyright @ 2021- WALL STREET. 3. When a concentrated soluti on of magnesium citrate is consumed, it passes through the intestines, drawing water and pro moting diarrhea, usually within 6 hours. Materials outgas by three mechanisms: release of absorbed gases (desorption from the bulk of the material), release of adsorbed gases (desorption from the surface only), and evaporation of the material itself. Ruth A Lawrence Poison and Drug Information Center (serving the Finger Lakes Region): 1-800-222-1222 (or 1-585-275-3232). In the 1980s the plastics industry led an influential . Magnesium citrate, Mg3(C6H5O7)2Mg_3(C_6H_5O_7)_2Mg3(C6H5O7)2, belongs to a class of laxatives called hyperosmotics, which cause rapidemptying of the bowel. [1] Its name derives from plasticity, a property of materials, which refers to the ability to deform without . . pathogenic bacteria which are harmful and disease producing when they invade plant or animal tissue are known as parasites bacteria are one-celled organisms that have plant and animal characteristics the division of a bacterial cell into two new cells is called mitosis the most common human bacteria are known as staphylococci Glove Selection and Usage above for more information on how to select the right glove for a job. Bisphenol AF is a component of certain plasters and used as a rubber bridging material, while bisphenol A is a monomer that is polymerized to manufacture polycarbonate plastic products, epoxy, and . When he stepped onto a beach on Hong Kongs uninhabited Soko Islands, Gary Stokes was surprised to find amid the discarded water bottles, shopping bags and usual piles of plastic waste a new type of garbage washing ashore. The ability to destroy or resist infection is known as ___. inactivate. One very useful group of materials formed from the reaction of phenol and formaldehyde is known as phenolic resins. This process makes phenolics generally more cost effective than thermoplastics . Thermoplastics and thermosetting polymers are types of plastic that undergo different production processes and yield a variety of properties depending on the constituent materials and production method. 5. powerful tuberculocidal disinfectants. Phenolic plastic, a composite resin material made from a combination of phenol and aldehyde, is a rigid material used in a wide range of consumer fitting applications. The higher the pH, the greater the tendency to see phenolic discoloration, especially "pinking.". This is a great space to write long text about your company and your services. Necessary cookies are absolutely essential for the website to function properly. The phenolic materials are, even today, important engineering plastics. These cookies do not store any personal information. Products used to kill microbes on contaminated tools and other nonliving surfaces are ___. texts to send an aries man Search. Emits acrid smoke and irritating fumes when heated to decomposition. Within museum collections, there are a variety of artworks and artifacts that are composed of organic plastic materials, either synthetic or semi-synthetic; these were created for a range of uses from artistic, to technical, to domestic use. Millions of these workers have been barred from doing their jobs during lockdowns, fueling economic distress while more plastic is routed to landfills and incinerators. Discarded masks are often spotted on sidewalks, a once unimaginable sight in the prim city-state, where littering carries heavy penalties. Phenols may ____________ certain rubber and plastic materials. Butyl rubber is an elastomeric polymer used widely in adhesives and sealants, both as primary binders and as tackifiers and modifiers. It uses rubber and chemical feedstock from a number of primary plant processes in the chemical and petrochemical industries. Certain links in this Guidance Sheet connect to other websites maintained by third parties over whom ZDHC has no control. Plastics have become an integral component of life, and many plastic artifacts have become cultural icons or objects worth preserving for the . Date the bag with the expiration date of the PEG and replace the bottle when it expires (use the opportunity to inspect the integrity of the other items in the kit, such as gloves, and replace as necessary). Face Mask Turned My Face Red, In addition . In general, nitrile is not recommended as a material of choice when working with phenol. Interface Science and Composites. The typical unifilled phenolic resin properties are given in Table 6.12. (607) 255-1111 (Ithaca cell phone) Global Supply and Use of Phenol. 84852-15-3 Phenol, 4-nonyl-, branched May Be Found In: - Outsole materials of shoes - Plastic and rubber components of apparel, footwear, and accessories . Double bag any contaminated clothing. Summary:Consult this chart for an overview of commonly used glove types for laboratory use and their general advantages and disadvantages. Disinfection The ability to destroy or resist infections is known as ___. Organisms that grow, feed, and shelter on or in another organism are known as ___. phenols May blank certain rubber and plastic materials. Phenols are also nitrated very rapidly, even by dilute nitric acid. The word plastic was originally used as an adjective to denote a certain degree of mobility and ease of acquiring a certain shape. Dozens and dozens of disposable masks. Watch a short video on correct hand washing: Consult this chart for an overview of commonly used glove types for laboratory use and their general advantages and disadvantages. Abrasion resistance. Printed or coated plastic materials and articles as well as those held together by Links to non ZDHC websites are provided for information and . Universal Hazardous Materials Reports. Phenolics are a class of resins commonly formed by the reaction of phenol (carbolic acid) and formaldehyde and catalyzed by an acid or base. The following plastic materials are considered safe for repeated autoclaving: Polycarbonate containers, though they are less resilient and can only . Mechanical Degradation. 1. The primary requirement of adding different compounding ingredients to develop the different grades of rubber compounds to meet various service needs at an economic price and to provide certain desired physical properties to a considerable . Wash after removal and air dry in the laboratory. These can be made from a variety of materials including plastics, rubber, paper and metal. EHS has designed a simple kit that can fit in a plastic zip-lock bag that laboratories can assemble themselves. Well, kind of, Video shows Memphis jailers beating Black inmate before his death, Skin lesion removed from President Bidens chest last month was cancerous, doctor says, CPAC shows the GOP has deep divisions heading into 2024, Abortion clinics crossing state borders not always welcome. They are a form of formaldehyde, have a very high pH, and can damage the skin and eyes. 6. Fluoroplastics (PCTFE, polychlorotrifluoroethylene; PVC (polyvinyl chloride, rigid or plasticized less than 5 percent, e.g., pipe, pipe fittings). household bleach. (little or no direct contact with the hazardous material) includes these situations: Always remove glove before touching common objects such as doorknobs, phones, or elevator buttons. 1. Medical experts believe reusable materials pose no additional risk, as long as they are routinely sanitized. Damage . Phenols may ____________ certain rubber and plastic materials. It is very hot and may cause burns from contact and also may cause the ignition of combustible materials. The structure of a phthalate ester is shown over. Single-use sachets have helped low-income consumers but cannot be easily recycled, and are spilling into the oceans. Butyl rubber is a copolymer of isobutylene with a small amount of isoprene. Properties of plastics. Phenolic is known by several trade names. venetian pool tickets; gelato punch strain allbud; 2008 wrx fender flares; does spirulina taste like fish; . callaway jones funeral home. This document can be added as a supplement to existing phenol SOPs. phenols may certain rubber and plastic materials. Many other models are commercially available in each glove category. This document provides the receipt and status reports for the period from 06/01/2020 to 06/30/2020. But opting out of some of these cookies may affect your browsing experience. Plastic's reputation fell further in the 1970s and 1980s as anxiety about waste increased. Phenol, molten is the white crystalline solid shipped at an elevated temperature to form a semi-solid. ____ is a level of decontamination which is second only to sterilization. Expired - Lifetime Application number US315722A Inventor Alfred N Iknayan Lester C Peterson Harvey J Batts germs Sodium hypochlorite is also known as ___ ___. Poor for halogenated and aromatic hydrocarbons. Phenols are also nitrated very rapidly, even by dilute nitric acid. Virus Bio-burden . Peeling strength: 24 h not less than 20 N/cm 2, 48 h not less than 25 N/cm 2; Composed of neoprene rubber, tertiary-butyl phenol-formaldehyde resin and certain amount of rubber ingredients and solvent etc. Plastic's reputation fell further in the 1970s and 1980s as anxiety about waste increased. 9. Because phenol solutions are an integral part of routine life science applications, their hazards may be taken for granted. The hazards of phenol are 2-fold. Phenol has an anesthetic effect and can cause severe burns that may not be immediately painful or visible. With plastic pollution, the conversation needs to shift away from an environmental problem to an economic development and rebuilding opportunity, said Rob Kaplan, head of Singapore-based Circulate Capital, an investment fund that recently announced it would spend $6 million to boost two small-scale plastic recyclers in India and Indonesia. They are usually found on panels, windows, doors, removable covers, and hatches. Good for acids, bases, oils, fats, peroxides, and amines. Tags: Question 3 . As a buffer. Fire resistance 8. The key revisions to the Standard are detailed below. Ivoplast is a type of plastic that is made from vinyl chloride. Polyethylene Glycol 300 or 400, 500 mL (~ 1 pint) USP or NF, Small plastic bag (for collecting waste gauze pads), Large plastic zip lock bag big enough to hold items above. Aside from edge and surface protection, rubber trims also provide sealing on mating parts acting the same way as rubber gaskets and . To prevent contamination of materials during handling. There are thousands of different kinds of bacteria, but they are classified into the following 2 primary types. Customers return the items, which are washed and sanitized before the next delivery. In the absence of well-designed recycling systems, many global cities rely on informal networks of waste pickers to collect and sort trash. Ithaca, NY 14850. In the 1980s the plastics industry led an influential . I understand people are afraid because they dont know whats going on with this virus, but its just a major setback for environmental protection, said Stokes, cofounder of Oceans Asia, an advocacy group. Phenol is a common chemical used for activities such as tissue preservation and DNA/RNA extraction. During an eight-week lockdown that eased June 1, Singapores 5.7 million residents generated an additional 1,470 tons of plastic waste from takeout packaging and food delivery alone, according to a survey. Office of Environment, Health & Safety2199 Addison Street, MC 1150Berkeley, CA 94720-1150, Have comments about the EH&S website? If you have a disability and are having trouble accessing information on this website or need materials in an alternate format, contact [email protected] for assistance. The Acquired Immune Deficiency Syndrome is caused by the ___. The threshold concentration of human skin damage from phenol is 1.5%. Such heating may initiate polymerization of the organic compound. Phenolic Plastic: Types of Phenols and Phenolic Materials . In the 1950s, dentists began to use a type of plastic called Melamine. During an eight-week lockdown that eased June 1, Singapore's 5.7 million residents generated an additional 1,470 tons of plastic waste from takeout packaging and food delivery alone, according . Excessive heating can melt most plastics. NOTE: This verbatim text is from the California Fire Code. Si continas navegando, asumimos que autorizas su uso. Westjet Inflight Entertainment App. Find materials, components, equipment, MRO supplies and more. Recent Accidents In Marion Ohio, Phenol 108-95-2 Hazard Summary Exposure to phenol may occur from the use of some medicinal products (including throat lozenges and ointments). Terms and Conditions, Environmental activist Gary Stokes collected dozens of discarded masks from a Hong Kong beach in February. Fallout 4 The First Step Preston Bug, Virus Bio-burden Some outgassed materials can deposit on other surfaces, contaminate the . Bakelite and Catalin are trade names for closely related plastics that are popularly collected today in the form of old timey radios ('Catalin radios'), colorful jewelry, toys, trophies and more. A Not cause diseaseBreak down foodProtect against infection 23 Q It is an impact-resistant plastic that is used in many products. Phenolic plastic, a composite resin material made from a combination of phenol and aldehyde, is a rigid material used in a wide range of consumer fitting applications. Submerging hands in a chemical or other hazardous substance, Need for physical protection from temperature extremes or sharp/piercing objects. Please contact the Office of Environment, Health and Safety at 642-3073 [email protected]. Phenol is famous as a precursor to many materials and useful compounds such as phenolic resins, plastics, and related materials. He previously covered South Asia from Mumbai, India, and national security from the Washington bureau. We hope the spikes in use of disposables in certain sectors are only temporary, and would not reverse hard-won gains to reduce plastic pollution, said Von Hernandez, a Philippine activist with Break Free From Plastic, an advocacy group. . Bimini Bon Boulash Finale, Some of the plasticizers used in vinyl plastics are phthalate esters. Phenolic machinable plastics are thermoset composite materials. On that overcast morning in late February, just weeks after Hong Kong had recorded its first coronavirus case, the environmental activist collected more than 70 discarded masks from a beach slightly longer than a football field. High-hazard commodities. Clients who appear completely healthy may bring MRSA into the salon, where it can infect others. They are light in weight and are chemically stable. Chapter 28 Review ~ Monomer Liquid And Polymer Powder Nail Enhancements, Chapter 1 Review ~ History And Career Opportunities, Chapter 3 Review ~ Your Professional Image, Chapter 4 Review ~ Communicating For Success, Chapter 5 Review ~ Infection Control: Principles And Practices, Chapter 7 Review ~ Skin Structure, Growth, And Nutrition, Chapter 8 Review ~ Skin Disorders And Diseases, Chapter 9 Review ~ Nail Structure And Growth, Chapter 13 Review ~ Basics Of Electricity, Chapter 14 Review ~ Principles Of Hair Design, Chapter 15 Review ~ Scalp Care, Shampooing, & Conditioning, Chapter 18 Review ~ Braiding And Braid Extensions, Chapter 19 Review ~ Wigs And Hair Additions, Chapter 20 Review Part 1~ Chemical Texture Services: Permanent Waving, Chapter 20 Review Part 2 ~ Chemical Texture Services: Chemical Hair Relaxing And Soft Curl Perming.