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Cosmetics > Hair Dying > Flashcards

Hair Dying Flashcards

1
Q

Why is hair colored?

A

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2
Q

The natural color of hair depends on

A

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3
Q

eumelanin

A

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4
Q

phaeomelanin

A

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5
Q

makes brown to black hair shades while phaeomelanin is responsible for blond and red colors.

A

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6
Q

You can have one or both melanin pigment types and the ratio and concentration of each determines your shade of hair color.

A

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7
Q

The absence of both melanin types produces

A

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8
Q

As the hair fiber grows/…..

A

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9
Q

How bleaching and dyeing hair works?

A

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10
Q

mixing the bleach in an alkaline solution.

A

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11
Q

First, the hair cuticle has to be

A

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12
Q

The oxidized melanin pigment is…..

A

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13
Q

The complete bleached hair is ….. rather than pure …. colour.

A

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14
Q

Bleach reacts more readily with the…..

A

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15
Q

Some gold or red residual color may remain after lightening depending on how much phaeomelanin your hair follicles make.

A

/

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16
Q

This process may be enough for those who just want their hair lightened.

A

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17
Q

Usually a finishing dye is added why

A

L

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18
Q

to hide the ….. color of the keratin which does not look a very
natural ……

A

.

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19
Q

Again, the cuticle has to be opened up for the dye to get inside the hair fiber using…..

A

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20
Q

In this process peroxide is used as a developer or oxidizing agent to

A

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21
Q

…….. a new permanent color is bonded into the hair cortex.

A

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22
Q

the technique is a two step process:

A

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23
Q

At the end of the process, an acid shampoo or a conditioner is used to …..

A

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24
Q

To go from dark hair to very light hair a pre-bleach is usually required to…..

A

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25
Q

Hair coloring preparations

A

/

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26
Q

There are four major classes of coloring and decoloring agents:

A

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27
Q

Hair colour shade is described by a range of….

A

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28
Q

Temporary and semipermanent products do not ….. the natural colour at all.

A

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29
Q

The rigorous lightening can only be achieved by…..

A

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30
Q

plant derivatives,

A

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31
Q

metallic dyes

A

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32
Q

Bleaching agents

A

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33
Q

Chemical bleaches must be:

A

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34
Q

Non toxic,

A

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35
Q

Mild in action

A

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36
Q

Free of harmful residues

A

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37
Q

…….fulfils the requirements because after releasing the oxygen it leaves no residue but water.

A

L

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38
Q

It is identified by volume content (number of volumes of available oxygen liberated by a given volume of the solution)

A

L

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39
Q

3-4% solution generate ……

A

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40
Q

5-6% generate….

A

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41
Q

Steps of hydrogen peroxide bleaching

A

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42
Q

The degree of bleaching depends on:

A

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43
Q

….. is activated by the addition of few drops of

ammonium hydroxide or ammonium persulfate powder

A

;

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44
Q

time of contact.

A

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45
Q

penetrate and attack the keratin structure

A

L

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46
Q

gradually lighten the shade of hair by oxidizing the melanin

A

;

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47
Q

Procedures

A

L

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48
Q

….. of NH4OH should be added to 1oz of hydrogen peroxide

A

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49
Q

The mixture should be applied to the ……

A

L

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50
Q

Advantage of procedure

A

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51
Q

DisAdvantage of procedure

A

;

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52
Q

Repeated application to the same portion of hair

A

;

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53
Q

No second shampoo is required

A

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54
Q

Hairs are kept ….. with the solution until the desired tint is obtained

A

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55
Q

The hair should be well shampooed and dried

A

;

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56
Q

Preparations

A

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57
Q

A-Brightening rinse

A

L

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58
Q

poured over the hair until the desired shade is seen R/

A

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59
Q

Hydrogen peroxide.

A

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60
Q

Ammonium hydroxide

A

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61
Q

Hydrogen peroxide can also be used in the form of :

A

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62
Q

cream

A

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63
Q

powder

A

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64
Q

oil bleach

A

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65
Q

shampoo.

A

P

66
Q

ammonium soap as ammonium oleate to be mixed with

A

L

67
Q

……l to be mixed with hydrogen peroxide and ammonia; white henna)

A

L

68
Q

tablet made of peroxide and urea to be dissolved at the
0
moment of use),

A

.

69
Q

PERMANENT DYES .

A

;

70
Q

molecules are allowed to diffuse into and
through the hair, then under a series of chemical reactions, generate
…….molecules incapable of being washed out.

A

.

71
Q

PERMANENT DYES The process requires three constituents and three steps:

A

L

72
Q

are the substrates coupled by oxidized intermediate and give a colourless diphenylamine, the leuco (colorless) form of the final indo dye.

A

.

73
Q

is the most commonly used. It is oxidized by alkaline peroxide and form an intermediate reactive species (diimine) (slow step).

A

.

74
Q

para-phenylenediamine (PPD,

A

.

75
Q

usually come packaged as two bottles.

A

.

76
Q

The actual dye has to be mixed with the…..

A

.

77
Q

There are three generations of permanent hair dyes:

A

.

78
Q

…….. are referred to as Level 3 colorants and use ammonia and 30 vol.

A

;

79
Q

H2O2 and need ……..min. to achieve.

A

.

80
Q

Recent improvements to this category include the use of an …… (…….to replace some of the ammonia

A

.

81
Q

Demipermanents or Level 2 colorants which apply ….

A

.

82
Q

are more suitable for gray hair and take shorter time (10 min.).

A

.

83
Q

….. will lighten the hair somewhat, but unless the hair is prebleached, the degree of lightening is modest and limited..

A

.

84
Q

Hair dyeing frequency

A

.

85
Q

you should not dye your hair more than….

A

.

86
Q

oxidative colorants usually last a ……

A

.

87
Q

more frequent applications may result in …… hair damage.

A

.

88
Q

Pharmaceutical forms of permanent colorant

A

/

89
Q

products come in many forms: liquid, cream, gel, and aerosol.

A

;

90
Q

dye base

A

.

91
Q

…. the dye and developer are kept separate inside the can in two individual plastic containers.

A

.

92
Q

When you press the valve construction on top, ……

A

.

93
Q

…… mixes the two together as they come out of the can.

A

.

94
Q

Advantages of aerosol permanent dye:

A

.

95
Q

Things that can go wrong with permanent hair dyes

A

.

96
Q

SEMIPERMINANT HAIR DYES

.

A

.

97
Q

There is no wasted dye.

A

L

98
Q

…….are relatively unstable. old hair dyes should be thrown away.

A

.

99
Q

if the reaction is not conducted under optimal concentration, temperature, contact time.. etc. the end result can be…..

A

L

100
Q

if they are applied inappropriately they…..

A

.

101
Q

if you do not like the end color, it is difficult to……

A

.

102
Q

Reapply a new dye, (severely damage hair).

A

.

103
Q

Either bleach out the hair dye

A

L

104
Q

These are large molecules but can penetrate and diffuse throughout the …….

A

.

105
Q

These do not involve a developer like peroxide to fix the color

A

L

106
Q

The dyes are called …… because the coloring changes will survive through several washes

A

L

107
Q

The time it lasts depends in SEMIPERMINANT HAIR DYES

A

.

108
Q

usually it resists 6-8 shampooings

A

L

109
Q

can produce an immediate change or the change may be more gradual, developing with time and multiple reapplications

A

.

110
Q

…….. over weekly intervals will gradually deepen the color to be like that achieved with the longer time, ……

A

.

111
Q

Because color change is less noticeable with repeated short applications over time, it is usually preferred by those with …..

A

.

112
Q

The great majority of these dyes belong to the following chemical
classes:

A

.

113
Q

are the most versatile semi- permanent dyes, are easy to synthesis, and have colour range from yellow to violet.

A

.

114
Q

have colour range from yellow to orange

A

.

115
Q

Aminoanthraquinones

A

.

116
Q

these complete the colour palette by

A

/

117
Q

The problem with semi permanent hair dyes:

A

;

118
Q

They usually do not reproduce dark brown and black shades that can be readily obtained with permanent dyes.

A

L

119
Q

➢It is better suited for those who want lighter shades of color and for those with mousy and gray hair.

A

.

120
Q

TEMPORARY COLOURINGS

.

A

L

121
Q

colour rinses’

A

L

122
Q

generally used for a specific event or occasion.

A

;

123
Q

removed by the first shampooing

A

L

124
Q

high molecular weight and do not penetration into the ……

A

.

125
Q

are acid dyes with minimal affinity for the overall anionic nature of hair, ……

A

L

126
Q

products formulated solely with D&C and/or FD&C dyes do not …

A

L

127
Q

cause allergy and you have to check 48 hr prior to application,

A

.

128
Q

application of heat after treatment with temporary colorants may significantly …… the durability of the dyes.

A

.

129
Q

VEGETABLE HAIR DYES

.

A

.

130
Q

METALLIC HAIR COLORANTS

A

;

131
Q

HAIR DYE REMOVAL

A

.

132
Q

Organic hair dyes, such as dyes made from indigo, camomile, logwood, walnut hulls, henna and many other plant sources were popular.

A

L

133
Q

….. is made from the ground up dried leaves and stems of the henna plant (Lawsonia inermis) that grows in North Africa and the Near East.

A

.

134
Q

usually green to look at in powder form because the dried leaves are green but the colour produced is red.

A

L

135
Q

…… usually made into a paste with hot water and then painted onto the hair.

A

L

136
Q

The degree of color depends in part on the ….

A

.

137
Q

The effects of henna hair dyes are …… and can build up ….. and by repeated application over several weeks

A

L

138
Q

The result is relatively ….. and can look quite attractive when done properly.

A

.

139
Q

It is a ……. but the results can last a long.

A

.

140
Q

The end result can be improved by adding……

A

.

141
Q

Additionally, the application is relatively simple and quick, easily added to a home hair care routine.

A

L

142
Q

VEGETABLE HAIR DYES

Disadvantages

A

.

143
Q

highly allergenic for some people.

A

.

144
Q

Variable and limited shade

A

L

145
Q

Messiness

A

.

146
Q

……… when applied to blonde hair will dilute the color and make the hair a lighter shade of blonde.

A

L

147
Q

Metallic hair colorants generally use….

A

.

148
Q

The colour is developed by the slow formation of…..

A

.

149
Q

METALLIC HAIR COLORANTS

Disadvantages

A

.

150
Q

limited and variable results

.

A

;

151
Q

uneven shade development

A

.

152
Q

possible sulfide odour

A

.

153
Q

HAIR DYE REMOVAL

A

.

154
Q

Sometimes necessary because of either a mistake or an undesirable result.

A

.

155
Q

The degree of difficulty in removal is related to…..

A

.

156
Q

Permanent hair dye

A

.

157
Q

Once hair is colored with …… hair dye, you are essentially stuck with the results.

A

.

158
Q

There are two options for corrective action:

A

.

159
Q

chemical treatment

A

.

160
Q

re-dying with another shade.

A

.

161
Q

……. the answer is much easier. The dye will come out gradually with regular washing.

A

.

162
Q

If you want to speed up the process a little, you can try applying some

A

.

Cosmetics (22 decks)

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