HairSite Admin
15.01.2009, 09:09 |
Hair coloring techniques (Hair Color) |
Hair coloring techniques
Hair coloring is a technique used by both men and women for altering the natural hair color or camouflaging the presence of gray hair.1 The hair color can be changed until the next shampooing, for 8–12 shampooings, or permanently. It can be dyed darker than the original hair color or lightened. This invention has added a whole new dimension to hair cosmetics and created a huge at-home hair dye and salon industry.
Several different types of hair dye cosmetics have been developed: gradual,
temporary, semipermanent, and permanent .Approximately 65% of the hair
dye market purchases are for permanent hair colorings, 20% for semipermanent
colorings, and 15% for the remaining types.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
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HairSite Admin
17.01.2009, 08:26
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Gradual hair dyes |
Gradual hair dyes
Gradual hair dyes, also known as metallic or progressive hair dyes, require repeated application to result in gradual darkening of the hair shaft. This product will change the hair color from gray to yellow-brown to black over a
period of weeks.There is no control over the final color of the hair, only the depth of color, and lightening is not possible.
The popularity of gradual hair dyes is due to their low cost and the ability to perform the dyeing procedures at home without the assistance of a professional operator. They must be properly applied, however, or poor color quality, stiff, brittle, and dull hair may result.
The metal can cause breakdown of the hydrogen peroxide in bleaching or permanent waving products,resulting in rupture of the hair shaft. Hair that has been treated with a gradual hair colorant must therefore grow out before other dyeing or waving procedures are used to guarantee an optimal result.
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HairSite Admin
20.01.2009, 14:42
@ HairSite Admin
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Temporary hair coloring agents |
Temporary hair coloring agents
Temporary hair coloring agents comprise only 3% of the hair coloring market and are removed in one shampooing. They are used to add a slight tint, brighten a natural shade, or improve an existing dyed shade.
The dye can be easily rubbed off the hair shaft and can run onto clothing if the hair gets wet from rain or perspiration. Temporary hair dyes do not damage the hair shaft and may be used by persons who are allergic to paraphenylenediamine. These dyes are most popular among elderly women
who wish to achieve platinum hair.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
email: hairsite@aol.com for free consultations
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HairSite Admin
21.01.2009, 12:57
@ HairSite Admin
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Semipermanent hair coloring |
Semipermanent hair coloring
Semipermanent hair coloring accounts for only 10% of the current hair care market. Semipermanent dyes produce tone-on-tone coloring rather than effecting drastic color changes, so their role is actually in toning rather than dyeing hair.The less color change required by the patient, the more satisfied he or she will be with the semipermanent dye result. Semipermanent dyes are best suited for patients with less than 30% gray hair who want to restore their natural color.
There are several different types of semi-permanent hair dyes based on the derivation of the dye. These include textile dyes, vegetable dyes, and synthetic hair stains.
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HairSite Admin
26.01.2009, 07:08
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Textile dyes |
Textile dyes
Semipermanent hair colorings derived from textile dyes are popular with both men and women. Since human hair is basically a textile, dyes for wool and natural fiber cloths are well suited for adaptation to hair dyeing.
These dyes are commonly available as shampoos and mousses. The shampoo-in process is most popular for home use. The dyestuff is combined with an
alkaline detergent shampoo to promote hair shaft swelling so that the dye can minimally penetrate the hair shaft. Thickeners and foam stabilizers are added so that the dye will remain on the scalp and not run into the eyes. The mousse formula incorporates the dyestuff in an aerosolized foam. Both products are applied to wet, freshly shampooed hair and are rinsed in 20–40 minutes Semipermanent dyes can become more permanent if applied to porous, chemically treated hair.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
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HairSite Admin
27.01.2009, 11:50
@ HairSite Admin
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Vegetable dyes |
Vegetable dyes
The very first hair dye ever developed historically was a vegetable dye known as henna. Henna is a plant that was used by the third dynasty of Egypt 4000 years ago to add red hues to their naturally brunette hair.
Henna is a semipermanent dye because minimal cuticle penetration occurs allowing removal of the dye in 4–6 shampooings.
More recently, henna has been combined with metallic salts to produce what is termed a ‘compound henna’, to provide a wider range of colors.
Natural hennas are inferior to synthetic hennas because they leave the hair stiff and brittle after repeated applications. Henna has not been reported to cause allergic contact dermatitis when used as a hair dye.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
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HairSite Admin
28.01.2009, 13:05
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Synthetic stains |
Synthetic stains
A newer type of semipermanent hair coloring is hair stain. Hair stain is a synthetic polymer, usually in unnatural shades such as red, blue, purple, or yellow, that imparts a hue or highlight to the hair.
The stain appears transparent so that it blends with the underlying hair color. The stain does not cover, but only tones. If heat is added to the staining process, the stain is more resistant to shampoo removal and if both heat and hydrogen peroxide are added to the staining process, the stain can penetrate the hair shaft deeply and become permanent.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
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HairSite Admin
07.02.2009, 12:57
@ HairSite Admin
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Demipermanent dyes |
Demipermanent dyes
A newer form of hair coloring that is longer-lasting than semipermanent dyes, but still not permanent, is known as demipermanent hair coloring. Demipermanent dyes are replacing semipermanent dyes and are available in both home-use and professional salon use formulations. They are longer-lasting, usually remaining through 10–12 shampooings, and have the advantage of longevity without sharp color contrast with new growth, a characteristic of permanent hair dyes.
Demipermanent dyes do not lighten hair, but are used to primarily add red highlights to brunette hair. Most commonly they are used to give the hair a burgundy hue, not attainable naturally due to the presence of only eumelanins and pheomelanins with brown and yellow colors. Burgundy hair requires the additional introduction of blue pigments into the hair shaft.
Demipermanent dyes are not as damaging to the hair shaft as permanent hair dyes, but may contain paraphylenediamine and thus may possibly cause allergic contact dermatitis in sensitized individuals.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
email: hairsite@aol.com for free consultations
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HairSite Admin
08.02.2009, 13:14
@ HairSite Admin
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Permanent hair coloring |
Permanent hair coloring
Permanent hair coloring is the most popular hair coloring technique on the market today,accounting for 85% of hair dyes sold for both professional salon and home use.
Permanent dyes have been embraced by mature men and women to cover gray and by adolescent boys and girls to lighten hair. Redyeing is necessary every 4–6 weeks, as new growth, known in the cosmetic industry as ‘roots,’ appears at the scalp.
Permanent hair coloring is so named because the dyestuff penetrates the hair shaft to the cortex and forms large color molecules that cannot be removed by shampooing. This type of hair coloring does not contain dyes, but rather colorless dye precursors that chemically react with hydrogen peroxide inside the hair shaft to produce colored molecules.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
email: hairsite@aol.com for free consultations
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HairSite Admin
09.02.2009, 13:16
@ HairSite Admin
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‘Hair foiling.’ |
‘Hair foiling.’
A relatively new trend in permanent hair dyeing is the technique of ‘highlighting,’ also known as ‘hair foiling.’ This technique involves the application of permanent hair dye to selected locks of hair that are then wrapped in the type of aluminum foil sheets used to cover oven-baked potatoes. The foil keeps the hair dye from touching surrounding hair
and preferentially dyes only the intended locks.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
email: hairsite@aol.com for free consultations
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HairSite Admin
13.02.2009, 23:26
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Minimizing hair dye damage |
Minimizing hair dye damage
Permanent hair dyes are the most damaging to the hair because the dye alters the internal hair shaft structure, resulting in decreased tensile strength.
It can be minimized by -
1. Do not attempt to lighten or darken hair by more than three shades.
2. Minimize the exposure of the hair to dye by prolonging the interval between dyeing
sessions.
3. If possible, always dye hair darker not lighter. Bleaching is more damaging than
dyeing.
4. If both permanent waving and permanent dyeing are to be performed, the hair should
be permanently waved first and permanently dyed second.
5. Allow 10 days between permanent dyeing and permanent waving procedures.
6. Minimize shampooing to prolong the life of the hair dye.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
email: hairsite@aol.com for free consultations
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reminder:
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HairSite Admin
16.02.2009, 04:31
@ HairSite Admin
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Minimizing hair damage |
Minimizing hair damage
Bleaching is extremely damaging to the hair shaft .Following the procedure there is a 2–3% weight loss from each individual shaft, resulting in decreased tensile strength and increased hair breakage.
This weakening of the hair shaft is more pronounced in wet hair, thus bleached hair should be handled minimally until dry.
Conditioners can do very little to improve the appearance of hair that has sustained such severe damage.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
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HairSite Admin
16.02.2009, 04:53
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HAIR DYE REMOVAL |
HAIR DYE REMOVAL
Occasionally, it becomes necessary to remove hair dye either due to a poor color result or the incompatibility of one dye with another chemical hair process.
Removal of hair dye depends upon the type of coloring process used. Temporary hair dyes are removed with one shampooing while semipermanent hair dyes are removed in four to six shampooings.
The amount of time for a dye to wash out is equal to the time required for the dye to color the hair shaft. For example, if it takes 20 minutes for a
semipermanent dye to penetrate from the cuticle to the cortex, then it will also take 20 minutes for the dye to exit the hair shaft. Thus, if the hair is shampooed for 5 minutes, thedye will be removed in four shampooings for a total elapsed time of 20 minutes.
Typically, hair dye removal is not a problem with temporary or semipermanent dyes and most patients are willing to wait while the undesirable color disappears.
Permanent hair dye removal is a much different matter, however. It is actually easier to bleach hair than to remove these unnatural pigments. Permanent dyes can be removed with either reducing agents or oxidants.
Gradual hair dyes, also known as metallic dyes, may also require removal from the hair, since they are incompatible with permanent waving procedures.
HairSite Admin is located in [NA] and he is available to meet: NO --- I offer research assistance for HairSite.
email: hairsite@aol.com for free consultations
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reminder:
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sarannan
08.06.2009, 03:50
@ HairSite Admin
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Gradual hair dyes |
Gradual hair dyes, also known as metallic or progressive hair dyes, ... The popularity of gradual hair dyes is due to their low cost and the ability to ...
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sarannan
08.06.2009, 03:51
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Vegetable dyes |
Study of the origin and development of the vegetable dye manufacturing industry in India, and a summary of measures to be taken for upgrading the industry. as a hair dyes...
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sarannan is located in [NA] and he is available to meet: NO |