This document discusses correlating hair porosity (water uptake) and tensile strength as methods to quantify hair damage from chemical treatments. It aims to validate the porosity method against the widely used tensile strength method. The study also compares damage from permanent waving, coloring, bleaching, and straightening to rank chemical processes by damage potential. This is the first comparative damage ranking for various hair care processes.
Paint and Coatings Manufacturing Industry. Project Opportunities in Paint Man...Ajjay Kumar Gupta
Paint and Coatings Manufacturing Industry. Project Opportunities in Paint Manufacturing Sector.
List of Profitable Business Ideas for Production of Paints, Pigments, Enamels, Varnishes, Solvents, Thinners, NC Thinner, Decorative, Domestic, Automotive, Textured & Industrial Paints, Wall Coatings, Primer, Protective Coatings, Wood Primer, Fillers, Undercoats, Putty, Epoxy Paints, Paint Additives
Paints and coatings industry is divided into two sub-sectors namely, industrial and architectural. Architectural coatings include both interior and exterior paints, varnishes, primers, stains, and sealers, and their demand is primarily depended on the growth and performance of the construction sector. Industrial coatings includes coil coatings, automotive paints, refinishers, furniture finishing, and road making paints, and their demand is linked to the growth and performance of the industrial equipment sectors, automotive industry, and appliance industries.
The India paints and coatings market has been segmented on the basis of application into architecture & decorative (interior and exterior), industrial wood coatings, general industrial coatings, automotive OEM, automotive refinish, marine coatings (hull and yacht), consumer durables, packaging coatings, mirror coatings, and others. Based on the technology employed, the market has been segmented into powder coatings, water-borne coatings, solvent-borne coatings, and others. The different types of protective coatings include waterproof, floor/roof, heat resistant, anti-reflective, coil and other coatings.
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Niir Project Consultancy Services
An ISO 9001:2015 Company
106-E, Kamla Nagar, Opp. Spark Mall,
New Delhi-110007, India.
Email: npcs.ei@gmail.com , info@entrepreneurindia.co
Tel: +91-11-23843955, 23845654, 23845886, 8800733955
Mobile: +91-9811043595
Website: www.entrepreneurindia.co , www.niir.org
Tags
How Paint is made? Paint Manufacturing Process, Paints Manufacturing, How to Start a Paint Manufacturing Industry, Paint Formulation and Process, How to Manufacture Paint, Process of Paint Production, Paint Making Process, Paints Formulations, Paint and Coatings Industry, Production of Paint, Paint Production, Paints and Coatings Production, Paints Production Plant, Paints and Pigments Production, Production of Paints and Varnishes, Manufacturing of Oil Paints, Coatings Manufacturing, Formulas for Manufacturing of Paints and Enamels, Formula for Paint Making, Formula for Preparing NC Thinner and Auto Thinner, Paint Making Business, How to Make Oil Paint, Production of Pigments, Pigment Production, Production of Enamel Paints with Formulation, Production of Enamel Paints, Varnish Manufacturing Plant, Paint and Varnish Manufacture, Production of Varnishes, How to Manufacture Paints, Varnishes and Lacquers, Manufacturing Process of Varnishes
L’innovation dans les petites et moyennes entreprises (PME) au CamerounUniversité de Dschang
M. Ndzana Eloundou Martin Jaurès a soutenu une thèse de Doctorat/Phd en Sciences Économiques ce 15 juin 2016 à l'Université de Dschang. Le jury présidé par le Prof. Désiré Avom lui a décerné la mention honorable.
Paint and Coatings Manufacturing Industry. Project Opportunities in Paint Man...Ajjay Kumar Gupta
Paint and Coatings Manufacturing Industry. Project Opportunities in Paint Manufacturing Sector.
List of Profitable Business Ideas for Production of Paints, Pigments, Enamels, Varnishes, Solvents, Thinners, NC Thinner, Decorative, Domestic, Automotive, Textured & Industrial Paints, Wall Coatings, Primer, Protective Coatings, Wood Primer, Fillers, Undercoats, Putty, Epoxy Paints, Paint Additives
Paints and coatings industry is divided into two sub-sectors namely, industrial and architectural. Architectural coatings include both interior and exterior paints, varnishes, primers, stains, and sealers, and their demand is primarily depended on the growth and performance of the construction sector. Industrial coatings includes coil coatings, automotive paints, refinishers, furniture finishing, and road making paints, and their demand is linked to the growth and performance of the industrial equipment sectors, automotive industry, and appliance industries.
The India paints and coatings market has been segmented on the basis of application into architecture & decorative (interior and exterior), industrial wood coatings, general industrial coatings, automotive OEM, automotive refinish, marine coatings (hull and yacht), consumer durables, packaging coatings, mirror coatings, and others. Based on the technology employed, the market has been segmented into powder coatings, water-borne coatings, solvent-borne coatings, and others. The different types of protective coatings include waterproof, floor/roof, heat resistant, anti-reflective, coil and other coatings.
See more
https://goo.gl/EbMysP
https://goo.gl/oN41ge
https://goo.gl/DHt3bV
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Contact us:
Niir Project Consultancy Services
An ISO 9001:2015 Company
106-E, Kamla Nagar, Opp. Spark Mall,
New Delhi-110007, India.
Email: npcs.ei@gmail.com , info@entrepreneurindia.co
Tel: +91-11-23843955, 23845654, 23845886, 8800733955
Mobile: +91-9811043595
Website: www.entrepreneurindia.co , www.niir.org
Tags
How Paint is made? Paint Manufacturing Process, Paints Manufacturing, How to Start a Paint Manufacturing Industry, Paint Formulation and Process, How to Manufacture Paint, Process of Paint Production, Paint Making Process, Paints Formulations, Paint and Coatings Industry, Production of Paint, Paint Production, Paints and Coatings Production, Paints Production Plant, Paints and Pigments Production, Production of Paints and Varnishes, Manufacturing of Oil Paints, Coatings Manufacturing, Formulas for Manufacturing of Paints and Enamels, Formula for Paint Making, Formula for Preparing NC Thinner and Auto Thinner, Paint Making Business, How to Make Oil Paint, Production of Pigments, Pigment Production, Production of Enamel Paints with Formulation, Production of Enamel Paints, Varnish Manufacturing Plant, Paint and Varnish Manufacture, Production of Varnishes, How to Manufacture Paints, Varnishes and Lacquers, Manufacturing Process of Varnishes
L’innovation dans les petites et moyennes entreprises (PME) au CamerounUniversité de Dschang
M. Ndzana Eloundou Martin Jaurès a soutenu une thèse de Doctorat/Phd en Sciences Économiques ce 15 juin 2016 à l'Université de Dschang. Le jury présidé par le Prof. Désiré Avom lui a décerné la mention honorable.
Oriflame Catalogue 11 UK & Ireland June 2015 buy at http://orijen.co.ukmike cook
Shop buy Oriflame Cosmetics securely online with Orinet independent Oriflame consultants for your favourite Oriflame make-up, Oriflame cosmetics, Oriflame skin care, Oriflame fragrance, Oriflame fashions and Oriflame beauty related products at http://orijen.co.uk
This is a preview of the Sensors in the Environment Conference which will be held in London on 15-16 October 2014. With a theme of he Environment and Human Health, the conference brings together leading academic researchers and industry executives to review the imapct of sensors in evenviromental monitoring
Nonprofit Recruitment for Organizational SuccessMarina Dawson
This webinar, presented by HR specialist Veronica Utton, outlines how to create a recruitment strategy; what traditional and non-traditional recruitment tools are available; the best way to create candidate short-lists; and planning for future stages of the recruitment process including interviewing, hiring and orientation. The information presented is specific to the nonprofit sector.
To view the full one-hour webinar, including audio, visit: https://charityvillage.com/elearning/webinars/past-webinars/nonprofit-recruitment-for-organizational-success.aspx.
Digital RNAseq Technology Introduction: Digital RNAseq Webinar Part 1QIAGEN
QIAseq RNA is a revolutionary turnkey solution for digital gene expression analysis by NGS. From 10 genes to 1000, from one sample to 100, QIAseq RNA delivers precise results on both ION and Illumina sequencing platforms. The data from QIAseq RNA is directly comparable to expression analysis derived from whole transcriptome sequencing or by qRTPCR, only better, cheaper, faster, and more flexible. This webinar will describe the principles of digital expression analysis by NGS, and review the features and benefits of the QIAseq system, options available, and the integrated data analysis package.
Care Instructions for Activewear & Swim Suits.pdfsundazesurf80
SunDaze Surf offers top swimwear tips: choose high-quality, UV-protective fabrics to shield your skin. Opt for secure fits that withstand waves and active movement. Bright colors enhance visibility, while adjustable straps ensure comfort. Prioritize styles with good support, like racerbacks or underwire tops, for active beach days. Always rinse swimwear after use to maintain fabric integrity.
MRS PUNE 2024 - WINNER AMRUTHAA UTTAM JAGDHANEDK PAGEANT
Amruthaa Uttam Jagdhane, a stunning woman from Pune, has won the esteemed title of Mrs. India 2024, which is given out by the Dk Exhibition. Her journey to this prestigious accomplishment is a confirmation of her faithful assurance, extraordinary gifts, and profound commitment to enabling women.
Johnny Depp Long Hair: A Signature Look Through the Yearsgreendigital
Johnny Depp, synonymous with eclectic roles and unparalleled acting prowess. has also been a significant figure in fashion and style. Johnny Depp long hair is a distinctive trademark among the various elements that define his unique persona. This article delves into the evolution, impact. and cultural significance of Johnny Depp long hair. exploring how it has contributed to his iconic status.
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Introduction
Johnny Depp is an actor known for his chameleon-like ability to transform into a wide range of characters. from the eccentric Captain Jack Sparrow in "Pirates of the Caribbean" to the introspective Edward Scissorhands. His long hair is one constant throughout his evolving roles and public appearances. Johnny Depp long hair is not a style choice but a significant aspect of his identity. contributing to his allure and mystique. This article explores the journey and significance of Johnny Depp long hair. highlighting how it has become integral to his brand.
The Early Years: A Budding Star with Signature Locks
1980s: The Rise of a Young Heartthrob
Johnny Depp's journey in Hollywood began in the 1980s. with his breakout role in the television series "21 Jump Street." During this time, his hair was short, but it was already clear that Depp had a penchant for unique and edgy styles. By the decade's end, Depp started experimenting with longer hair. setting the stage for a lifelong signature.
1990s: From Heartthrob to Icon
The 1990s were transformative for Johnny Depp his career and personal style. Films like "Edward Scissorhands" (1990) and "Benny & Joon" (1993) saw Depp sporting various hair lengths and styles. But, his long, unkempt hair in "What's Eating Gilbert Grape" (1993) began to draw significant attention. This period marked the beginning of Johnny Depp long hair. which became a defining feature of his image.
The Iconic Roles: Hair as a Character Element
Edward Scissorhands (1990)
In "Edward Scissorhands," Johnny Depp's character had a wild and mane that complemented his ethereal and misunderstood persona. This role showcased how long hair Johnny Depp could enhance a character's depth and mystery.
Captain Jack Sparrow: The Pirate with Flowing Locks
One of Johnny Depp's iconic roles is Captain Jack Sparrow from the "Pirates of the Caribbean" series. Sparrow's long, dreadlocked hair symbolised his rebellious and unpredictable nature. The character's look, complete with beads and trinkets woven into his hair. was a collaboration between Depp and the film's costume designers. This style became iconic and influenced fashion trends and Halloween costumes worldwide.
Other Memorable Characters
Depp's long hair has also been featured in other roles, such as Ichabod Crane in "Sleepy Hollow" (1999). and Roux in "Chocolat" (2000). In these films, his hair added a layer of authenticity and depth to his characters. proving that Johnny Depp with long hair is more than a style—it's a storytelling tool.
Off-Screen Influenc
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Understanding the Mahadasha of Shukra (Venus): Effects and RemediesAstro Pathshala
The Mahadasha of Shukra (Venus) is one of the most significant periods in Vedic astrology. Shukra is known as the planet of love, beauty, wealth, and luxury. Its Mahadasha can bring about profound changes in an individual's life, both positive and negative, depending on its placement and condition in the natal chart.
What is Shukra Mahadasha?
Mahadasha is a planetary period in Vedic astrology that affects various aspects of an individual's life for a specific number of years. The Mahadasha of Shukra lasts for 20 years and is known to bring a period of significant transformation. Shukra is associated with pleasures, creativity, relationships, and material comforts. During its Mahadasha, these areas of life tend to get highlighted.
The Fascinating World of Bats: Unveiling the Secrets of the Nightthomasard1122
The Fascinating World of Bats: Unveiling the Secrets of the Night
Bats, the mysterious creatures of the night, have long been a source of fascination and fear for humans. With their eerie squeaks and fluttering wings, they have captured our imagination and sparked our curiosity. Yet, beyond the myths and legends, bats are fascinating creatures that play a vital role in our ecosystem.
There are over 1,300 species of bats, ranging from the tiny Kitti's hog-nosed bat to the majestic flying foxes. These winged mammals are found in almost every corner of the globe, from the scorching deserts to the lush rainforests. Their diversity is a testament to their adaptability and resilience.
Bats are insectivores, feeding on a vast array of insects, from mosquitoes to beetles. A single bat can consume up to 1,200 insects in an hour, making them a crucial part of our pest control system. By preying on insects that damage crops, bats save the agricultural industry billions of dollars each year.
But bats are not just useful; they are also fascinating creatures. Their ability to fly in complete darkness, using echolocation to navigate and hunt, is a remarkable feat of evolution. They are also social animals, living in colonies and communicating with each other through a complex system of calls and body language.
Despite their importance, bats face numerous threats, from habitat destruction to climate change. Many species are endangered, and conservation efforts are necessary to protect these magnificent creatures.
In conclusion, bats are more than just creatures of the night; they are a vital part of our ecosystem, playing a crucial role in maintaining the balance of nature. By learning more about these fascinating animals, we can appreciate their importance and work to protect them for generations to come. So, let us embrace the beauty and mystery of bats, and celebrate their unique place in our world.
La transidentité, un sujet qui fractionne les FrançaisIpsos France
Ipsos, l’une des principales sociétés mondiales d’études de marché dévoile les résultats de son étude Ipsos Global Advisor “Pride 2024”. De ses débuts aux Etats-Unis et désormais dans de très nombreux pays, le mois de juin est traditionnellement consacré aux « Marches des Fiertés » et à des événements festifs autour du concept de Pride. A cette occasion, Ipsos a réalisé une enquête dans vingt-six pays dressant plusieurs constats. Les clivages des opinions entre générations s’accentuent tandis que le soutien à des mesures sociétales et d’inclusion en faveur des LGBT+ notamment transgenres continue de s’effriter.
2. I>ropri;ltt' for lllc:lsuring the change treatmenls if il correlates wilh most Widely accepled
in diameter of tfrican·descellt fibers methods for measuring hair d:lmage. One of those melh·
where the inherent variation in diam- ods is the measurement of tensile strength,
eter is significant within a single fiber
along the hair shah.'quot;
Tensile Strength of Hair
Weigbl melbo/I: The wdght The tensile propenies of hair fiber.!> play an imponant
method is much less tedious and has role in eJcterrnining the efficacy of hair treatments such as
the ability to study the swelling or permanent wavcs. pcrmancllt hair colors. bleaches and
water uptake of hair fibers using a permanent hair straighteners. The influencc of '3.rious
centrifuge. With thb method. a single hair tre:ltments on the tensile propenics of h2ir can be
operalOr can conduce mure Ihan 50 measured using tensile meters such as Insuon' and Oia-
measurements a day_ ,- The weight Stronquot;,I.
method is also known as the liquid One commonly used method 10 deu'rmine ifhair fibers
retention or porosity test. Valko and have been altered by treatment with cosmetic productS is
Uarnell ha'c defined I>orosity as the 10 extend the fibers 10 20quot;quot; ofthcir lengt h before and after
capacity of hair fibers to absorb wa- treatment and detemlin(' the so-called F20 Index. A single
ter.'quot; Chemically d:tma}o:ed fibers arc fiber is stretched 10 20% Strain orclongation:1I a specified
considered hrdrophilic or porulls:lnd COnSl:lnl rate (dong:llion per minute). The area under lhe
therefore would more readil)' pick up curve (Energy) reqUired 10 slrelch the fiber to 20% str:.lin
moisture :lIld retain W:llcr than the is used to assess the condition of Ihe fiber, The index
U1ureated or unmodified hair. Valko values (After/Before Treatment) :Ire e:tlculated and used
and Uarnclt believed that lhe gre:lter 10 assess Ihe extent of hair damage. An Index of less than
the porosity of hair, the greater was 1,0 indicales damage to th(' hair fiber produced by thc
the damage 10 the hair fiber, They chemical hair product. This mClhod was first den:loped
found the uptake of water for un· b)' Speakman in 1947 in order to study Ihe effects of
modified or normal hairto be 31.10%. physical and chcmical processes on kcratin propcnics.
Therefore, the poro.!>ity technique may
become:l primary method for dcter· ·llI$lmquot; Iml,.,., e.quot;por.,,_•. Omquot;'quot; ,1/'os.lIKbuJl'1b
mining hair damage due to cosmetic ·'Nt-51ron. f)k.-SltWl Uti ~Q, f·... lSlf..quot;quot;...
581Cosmellcs & To<lelll6tquot; magazine WNW TheCosmelic$'lecom Vol 117, No 11/Novembet 2002
3. Table 1. H11lr trNtmenb by commetel8l cosmetic products prior to determination of porosity and tensU,
strength of IrNhKI hlilr flberw
--
Hol,
T _ .......
-
T_ _
_....
T_
..... ...-
-- -
.... 28 g Logicquot; Permaoent Color Blond-12G AN ~1T'in TRP AN' '~NCS
--... 38 g logIC Color 0eIIel0pef (30 YO! H,OJ
77 g SyntoOCs' Mulbplex Acid Wave lotIOn AN 2O~TRP 2.51'lW'1 5~CNS 2.511'lln
18.5 g Syntcncs Wllving lIClJVator
.. ,-
-.-
Relexer GHquot;
HIIII bleach'
Alfirme No-Base ReWcer
139 g Affirm No-lye No-BMe ReIa.llerquot;
37 g Affirm liquid ActIVIIIOf
1.5 g logk: Powdef 8lee<:h
12,
12,
AN'
.. -
~
45 mlnTRPH
,-
,~
3 min
2 ITWI 2x NCNS
2 min 2x NCNS
1 min NeS
,~
1 min
9.0 g Logic COlor GeneratOf (30 vol)
quot; Rmsed wilh Wllfm funning lep waler
• Rinsed willi fUfllling laP walef
~ Rinsed until all excessive Color was gone
• Applied by bfIstl to COYEIf enlUelJes5
quot;logIC product, life manule<:tured by Malnx. a pat! of L'Oreal, Fraoce.
'Syntoruet. I, a tradernartl of Syntonics Inlematlonal. Sl.rMlII, Illinois USA.
_...-
• Affirm ia alfaclemarll of AVIan IfldustrI8S Inc. 6ec:lIofd PanI, Illinots USA.
• Affirm SensitlY'I Scalp No-Lye No-8ase Re/axef NgrmaJ Strength
I Pem'Ianenl half reiaxel' contIirWIg sodiun hydroxide
•P8m'IaoenI half relaxer contasfW1g guanidine /1ydroxIdIll
m.as~
NCS • non-<:OI'ldi.oOfWlO shampoo
eNS • condiUoning neutralizWlg shampoo
NCNS. non-condibonlng neutralimg shampoo
TAP. tress Wl'apped in plastic
TRPH • treas wrapped in plaslic and placed i,n;Ier oYerhead dryer al 55-<:
Speakman used a percentage to express the changes in hair using the methods of Spcakman lH
thc stress for a fixed strain of fibers. IH and Menkan et ai.'
Sooknc and Harris coined the tenn 30% indcx as the Therefore, in order to verify thc reli·
ratio of extension values. 19 This test is similar to the F20 ability of the porosity/Weight method,
test except that the singlc fiber is stretched to 30% strain we dcsignt.quot;d a study to com:I:lle the
or elongation. porosit}' of rum flbelquot;S at I{)(J% humklit}'
Over the laSi 50 }'(:;1rs, it has become a standard practice with the tcnsile stn:llgth of h.:Ur fibc:rs at
to ;1SCen;1in the F20 Index of the fibers bt'fore ;1nd :mer thc 100% humidity, We hypothesizc.quot;d that a
given trr.ttment in ortler to detcnnine the positive or nega· nc:gath'tquot; COITd:ttion would exist bc.:twt:t:ll
ti'e effect of the treatment on the fibt'rs, In 1966, Menkan el porosit}' and tensile sucngth. Addition-
al. compared the F20 Index of hair and wool and found hair a.lI}', we assc:.:ncd thai if the cocfficinu of
to h;1'e slightly higher no Index than wool. I detcmtination (r-) is al 0.95 or highc.:r.
In addition, man}' published studies ha'<quot; examined the then the porosity/wcight method would
changes in the tensile strength ofcosmeticall)' modified hair be considered COrn:latLquot;d and thereb}'
in the area of pcmlanent hair colors. permanent hair wavcs, established as a reliable method for fu-
and hair bleaches.~'quot; The field of pennancnt hair relaxers is tun.: USC in thc labor:uory.
not well rcsearched, although Syed et :11. have compared the 111is method will cnablt: the hair
tensilt:: strength of Caucasian hair against African·American rcsearcher to obtain rcsults that are
Vol 117, No 11!Novembef 2002 www.TheCosmel.eSile.com Cosme/icsquot; ToilfJ/fleS<- magazloo/59
4. % Porosity = {[W. - (W - 0.162Wl]IW.1 x 100
where
An,... ~ora.lquot;
W. = Weighl 01 hair Immediately after centrifuging
Trttlmtrrt frIlquot; (%)
W = weight of hair at 65% R.H.
w- O.162W is described by Mankart at aI.' Untrealed 3t.15 i:0.63 N.6
Hair colof with 30 vol develope' 32.01 ±0.12 N.S
(The average % moisture absorbed from 0% to 65% R.H. for
Acid wave 35.32 i:0.29 N:S
normal hair is approICimately 16.2%.) Hai, relaxer (NaOH) 36.15i:1.26N_S
Hair relaxer (gl.lanidine) 38.00 i: 1.1 7 N.7
ngun I. CAlrutQl/on o/port/$U,r
Hai, bleach with 30 vol developer 54.57 i:2.48 N.5
N • Number Of samp~s
bOlh fasler and reliable. This method 'See Table I for specific plquot;oducts lested.
will also allow the haif dH:Olisl to
compare I he degree ofd:lmagc impanel!
during various cosmetic treatments.
Table 3. Tensile strength of treated hair
Experimental
Trf!(llillg tI}e bquot;ir: For the poros- Anrlquot; telllll,
ity testing, all h:llr used was Callcl- T,,,lmenl quot; quot; , IIrtng1ll (mJ)
sian h,llr 8 inches long, assembled Untreated t.210i:0.1SN=60
into six tresses of equal weigh!. Till' Hair color with 30 ~ol de~eloper 1.138 i:0.20 N..41
tresses wcrc accur:ltcly weighed on ACId wave 0.991 i:0.12 N_SS
an analytical balance :114.0 gfO.1 mg. Hair 'elaxer (NaOH) 0.776i:0.11 N=53
Hair lelaxer {guanidine) 0.698:1:0,11 N..57
For lesting tht: tensile strength of
Half bleach with 30 vol developer 0.480 i:0.08 N .. 51
the hair. dark brown European-de-
scent fibers (Level 2) of 80-90 mi· N= Numbel or samples
• see Table 1 fOl specific products tesled.
crons were obtainell'- anll separ-lled
inlO six lIifferelll groups.
Of thl' six weighed tresses, one
was lefl untreated as a control, and utilizing the centrifuge method of Valko and Bametr.~ Each
each of the other tresses was sub· of tlte six tresses was dh'ided imo eight So1mplcs weighing
jected 10 one of thc following cos· 05 gram each. All samples were equilibrated at 65% rdative
metic treatmenls: permanent hair humidity and 21°C for 2 weeks prior to using.
color, acid wave. permanent hair re· To begin the porosity measurements, each s:tmple was
laxer (sodium hydroxide), permanent wdghell at 65% R.H. using a microbalance d • The samples
hair relaxer (gu:lllidine hydroxide) were immersed in 100 011 of deionized water for 30
and hair bleach. Details of these treat· minutes, removed with stainless steel forceps. and placed
ments arc presented in Table I. The into polystyrene centrifuge tubes (28 011) containing a
method oftreatment employed in c:lch mesh at the bottom of the tubes to keep the hair separate
case was the same:ls pr.u.:ticed in the from the drained water. Thc tubes were capped and
market place. centrifuged~at 7,000 rpm for 10 minutes. After centrifug-
The six sized groups were I'ro- ing, the samples were rcmoved and wcighed again on the
cessed in the same way asthe Weighed microbalance. This method prOlluccd repeat:lble results
tresses, again according 10 the details for cach of the Ire:t1ments. The porosity of hair was
presented in Table I. ca1cut:lted as shown in Figure I.
Dctermltl/quot;g 1Jalr' porosity: The Delermlt,lquot;gflber lertsile strequot;8th: The Ulltre:lted
porosity of the hair was de[ennined fibers and fibersof chemically treated tresses were crimped
at 30 mm length from the root tip and then immersed in
deionized water at 21°C for 30 minutes. Then the amount
s,·quot;,
• I A'.Ifquot;quot; IJquot;,/I,.,,,,. 1'quot;,*. ,j./t. 1'quot;,* llSA J
quot;'I'I/Iquot;r MIquot;fliJquot;,/(mf'·. ,ul'l/I,-, TuI..fo bt,lm,c,· of work required to extend the wet fibers by 20% ofthdr
mU</,1-1'(.'·HOU, ,U,-lIf,quot; ''',J,v/o Illc. Coiquot;mbu$. originallcnglh was determined on the :Htlomated tcnsile
001(, {')ojl
,. J ,11<quot;1/1<quot; MI,·mlx/Iquot;,,,·,'. ,1/quot;/1/(quot; ·1<.I<v/quot; IN/IIIIquot;'quot;
quot;'0</<1 quot;,'O/.fOO. M,1'/,'r n,J,vfo Iquot;c.• O,Jquot;quot;,bus,
lester (!'hase I = 20%; Maximum Force = 200 gmf: Num-
berofcycles= I: Gauge = 1).
• OOI,,'r.'itt
quot; quot;quot;/quot;flliI//oowl Cc'.urlfi'..~' quot;'0<1,1 (.quot;(''111quot;(1 ·t. quot;!lO'
quot;,,,tI,'/ HM. 11:quot;C 1quot;/quot;rull//(}Iwlll'/u'pquot;,,'m 'I)/il-Sm.., Milllquot;/,,,,.· T<'II5111' 7''SI,-r. f)il/-S/'W, fJd. IJrocmll,lI. 1'''''5)1/v'''/I'
...quot;quot;pm,)·. ,'quot;,v:lbquot;quot;, 1k.;p,bl,·.•IllI.<!i<.cb'....·1IJ 1JX.j
quot;'<
GO/Cosme/,cs & Toiletries'quot; magazine www.TheCosmeticSile.com VOl. 11 7. No 11/November 2002
5. -
LO
0.8
0.6
~·O.9607 ~
O'
0.2
0.0
31.15 32.01 35.32 36,15 38.00 54.57
Untreated Hair Color Acicl Wave Sodium Guanidine Hair Bleach
Hydroxide Hydroxide
Relaxer Relaxer
FJ,Il,., 2. CQ~/.,II(Jn betwlllln ptJrosU, tquot;,d tllMUII stnnglb olbnlr ',.,alf'd by .ff!/«tf'd cosmetic products
(see TAble I!tlr detflUS on the ProdllctS tested)
Results and Discussion is similar 10 the order of water uptake for l~al~h of the
cosmetic treatments in Table 2.
11 is apparent from Table 2 that
Using a statistical pack:tge~. we corrd:lIcd the porosity
untreated hair has the lowest amount
data from Table 2 and tensile strength data from Table 3.
of water uptake (31.15±O.63%, N=6)
Thc coefficient of determination (r~) was found to be
tll;lt is very close to tile value of31.18%
O.9607(Figure 2.). which isStatistically sigoificlnt. There·
found by Chamberlain and
forc, the water uptake method orporosit)' metho<.l and the
Speakman.quot; Our value of 31.15% is
tcnsile strength method arc highly correlated.
also very close to the valutquot; of
As shown in Tables 2 and 3. the orderofdamagc caused
31.IO±1.00% found b)' Valko and
by the cosmetic treatmelllS is:ls follows: Untreated hair <
narnetl.~ Therefore, our method of
Permanelll Hair Color (Golden B1onde·level 12) < Pemla-
determining water uptake is in agree-
nem Wave (Acid Wave) < Ilair Iklaxer COntaining sodium
ment with both of those studies.
hydroXide < Ibir Relaxer containing guanidine hydroxidc <
The cosmetic treatments such as
Hair Ble;lch.
permanent hair colOr, acid wave. per·
manent hair rc:la..xers and hair bleach Conclusion
impan increasingly higher water in
II is clear from this study that V:llko an<.l Barncft's
that or<.ler, as shown in Table 2. It is
weight method (water uptake) or porosity of hair is
clear that permanent hair rclaxing
significantly correlated (r'= 0.9607) to tensile strength of
and hair bleaching arc more damag-
hair when hair fibers arc chemically treated with various
ing than processes such as perma-
cosmetic trC:l(mcms.
nent hair colors and acid permanent
This study also compares lhe damage imparted to hair
waves.
fibers from various chemical cosmetic treatments such as
As shown in Table 3. untreated
permanent hair colors, acid permanelll waves. hair relax-
hair had the highest avemge tensile
ers and hair bleaches. The order of magnitude of hair
strength(I.210±O.180 m), N=60). On
damage is also determined and it is found that permancnt
the other hand, cosmetic treatments
hair colors are least damaging followed by acid permanent
such as permanent hair color. acid
waves and hair relaxers. whereas the bleaching of hair is
wave, pcrmanent hair relaxcrs and
the most damaging cosmetic treatment.
hair bleach produced incre;lsingl)'
The weight method or porosity of hair is a Jess tedious
greater rcductions in tensile strength
and less time-consuming method for cosmetic chemists. It
(to a low of0.480tO.080 m). N=51).
can be used instead of the tensile strength method to
The order of damage in terms of ten-
determine the degree or damage.
sile strength for each of the cosmetic
The porosit)' method woulquot; seem to be especi:llly
treatments is shown in Table 3 and it
convenient to usc on excessively curl)' hair in which the
Young's modulus varies signific:lIltl)' within a single hair
• 51'SS. JI'SS hlC, ChICtlJ,quot;'. 11I1quot;,,/5 UI:1
fiber due to its cver-changing diameter along the hair
62/Cosmerics & Toile/riesquot; maguine www.TheCosmelicS.le.com Vol, 117. No. Il/NOvember 2002
6. shaft. The Young's modulus is equal manent hair colors; this study was limited to only one hair
to the stress / strain, where strain is color and only a 30 volume developer. Similarly, this study
the deformation expressed in length, needs to be expanded to various types of permanent
while stress is equal to the force di- waves, such as alkaline permanent waves.
vided by the cross-sectional area of
the fiber. The modulus is usually ob-
Reproduction of all or any part of this article in English or any other
tained in the Hookean region (less language is strictly prohibited.
than 2% strain) where the fiber can be References
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magazine. 362 South Schmale Road. Carol Stream, IL 60188-2787 USA.
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Key -- Integrating RITA teric surfactants. 7. L Wolfram, The reactivity of human hair: A
review, in Hair Research, New York: Springer-
The Reuolutionary new RITR Product line -- 8
Verlag (1981) p 497
TA Evans, TN Ventura and AB Wayne, The
5Uersatile Cost Effectiue Ritafactant Blends kinetics of hair reduction, J Soc Cosmet Chem
45 279-298 (1994)
• Easy-to-handle in a blended liquid form - they do not require 9. EI Valko and G Barnett, A study of the swelling
of hair in mixed aqueous solvents, J Soc Cosmet
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• Available for clear or opaque blends; torJ;1ll!lat lDJ;S!FJUllY 10 Milady's Standard Text Book of Cosmetology,
Albany, New York: Thomson Learning (2000) p
cold mix and all natural ~urf~ctanri~~tipns.
233
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i;;,,,i Marcel Dekker (1997) P 17
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For a FREE Product
Foaming Hocker, The influence of the cosmetic swelling
behavior on the quality of the permanent wave,
Proceedings of the 16th IFSCC Conference,
Sample or more
information, ball:
(800) 426..7759
t It New York, October 8-11, 1990, vol 1 (1990) pp
315-324
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advances in treating excessively curly hair,
lie
Cosmet Toil 113(9) 47-55 (1998)
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African-American Hair: Its physical properties
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f@RITA RITt Corporation
of hair in thioglycolate solutions and its
reswelling, J Soc Cosmet Chem 92-100 (1953)
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use with animal fibers, J Text Inst 38(2) T 102-
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19. A Sookne and M Harris, J Res Natl Bur Stand 19
535(1937) C=&T
P.O. Box 1487
Woodstock, IL 60098
FAX: (815) 337quot;2522
E-mail: cservice@ritacorp.com
Web Site: www.ritacorp.com
64/Cosmetics & ToiletrieSii' magazine www.TheCosmeticSite.com Vol. 117, No. 11/November 2002