Hair dye and hair-dyeing methods using the same

Details Hair dye and hair-dyeing methods using the same Hair dye and hair-dyeing methods using the same

2000-08-25

2003-12-02

Gupta, Yogendra N. (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

C008S423000, C424S701000, C424S401000

Reexamination Certificate

active

06656229

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to hair dyes and, more particularly, to a new hair dye using a fresh natural indigo leaf or a juice of a fresh natural indigo leaf. The present invention also relates to a method for dyeing hair using such dyes.
2. Description of the Prior Art
Conventionally, several compositions and methods for dyeing hair have been known. Examples of such a known hair dyeing dye include a synthesized hair dye using an oxidation dye which have a high hair-dyeing performance as well as a long-lasting performance, a plant-based hair dye which contains “henna” as its primary component and is widely used in Europe and in the US, and a hair dye commonly referred to as “hair manicure”, to which an acid dye is blended.
Each of the known hair dyes is associated with certain drawbacks. Oxidation dyes are known to cause allergies in humans. The “henna” dye has a limited variation in color and does not go well with the black hair of the Japanese. Some allergic events are also reported for the dye. Acid dyes have a low durability since the dyes are just soaked up by the hair. Some of the conventional hair-dyeing agents are known to stain skin when spilt onto skin.
A hair dye is proposed in Japanese Patent Laid-open Publication No. Hei 10-53720 which is made by emulsifying or suspending a powdered plant-based dye together with liquid silicone, paraffins, a plant or animal oil using a surfactant or the like. Though this hair dye has an improved agent stability as well as an enhanced functionality in terms of hair-dyeing operation, it has a relatively low hair-dyeing performance, a property which should be prioritized for a hair dye. Thus, this hair dye does not meet all of the requirements either.
The indigo plant has long been grown by mankind and has a long history of being used as a dye for dyeing fibers, a coloring agent for food, or a medicament such as a detoxifying agent or an antipyretic agent. Making use of the dye component of the indigo in dyeing hair may provide those who are sensitive to conventional hair dyes with the benefit of dyeing their hair without having troubles. Furthermore, the indigo dyes are free of irritation and damage to scalps and hair and give hair body and a new texture of hair, providing a hair-dyeing effect that suits hair color of the Japanese.
SUMMARY OF THE INVENTION
The present invention addresses the above-mentioned problem. Accordingly, it is a first object of the present invention to provide a new hair dye using a natural indigo plant which does not stain skins when spilt thereon and is, for example, capable of preventing white hair from turning yellowish and of dyeing hair with natural tone while hiding white hair and which provides long-lasting, durable colors. A second object of the present invention is to provide a hair-dyeing method of dyeing hair using such new hair dyes.
The hair dye according to the first aspect of the present invention uses indigo dyes, which have a long history of being used as dyestuff for fibers, for the purpose of dyeing hair. The dye has an excellent shelf stability, does not stain skins when spilt, and provides long-lasting, durable colors. The dye is advantageous in that it allows the people who are sensitive to conventional hair dyes and could not dye their hair to enjoy dyeing their hair. The dye is free of irritation and damage to scalps and hair and is capable of preventing white hair from turning yellowish and of providing hair with natural tone. Also, the dye provides hair with a new textile and provides a long-lasting color that suits the hair color of the Japanese.
In order to attain the above-mentioned objects, a first aspect of the present invention is a new hair dye comprising, as essential ingredients, (i) a formulation primarily composed of a dye component including indican derived from an indigo plant and (ii) a formulation primarily composed of a &bgr;-glucosidase enzyme component.
The hair dye according to the first aspect of the present invention uses indigo dyes, which have a long history of being used as dyestuff for fibers, for the purpose of dyeing hair. The dye has an excellent shelf stability, does not stain skins when spilt, and provides long-lasting, durable colors. The dye is advantageous in that it allows the people who are sensitive to conventional hair dyes and could not dye their hair to enjoy dyeing their hair. The dye is free of irritation and damage to scalps and hair and is capable of preventing white hair from turning yellowish and of providing hair with natural tone. Also, the dye provides hair with a new textile and provides a long-lasting color that suits the hair color of the Japanese.
A second aspect of the present invention is characterized in that, in the foregoing hair dye, the formulation (i) primarily composed of the dye component including indican derived from an indigo plant is one selected from the group consisting of a fresh indigo leaf &bgr;-glucosidase of which is inactivated, an extract solution which contains indican extracted from fresh indigo leaves and which has its &bgr;-glucosidase component inactivated, an indican-containing powder obtained by freeze-drying the indican-containing extract solution, an indican-containing formulation in which the fresh indigo leaves having their &bgr;-glucosidase component inactivated and/or the indican-containing extract solution and/or the indican-containing powder is carried by a carrier such as starch, cellulose, and silk powder, and a mixture thereof.
The hair dye according to the second aspect of the present invention, which uses the formulation (i) which is not only highly stable but can also be obtained easily and economically, has the same advantages as the hair dye according to the first aspect of the present invention. The dye has a further advantage that it can be manufactured more easily and economically.
A third aspect of the present invention is characterized in that, in the foregoing hair dye, the formulation (ii) primarily composed of the &bgr;-glucosidase enzyme component is one selected from the group consisting of a fresh indigo leaf, Enokitake (
Flammulina velutipes
), Shiitake (
Lentinus Edodes
), a young corn leaf, an apricot kernel, an almond, a &bgr;-glucosidase-containing extract solution extracted therefrom, and a mixture thereof.
The hair dye according to the third aspect of the present invention, which uses the formulation (ii) which is not only highly stable but can also be obtained easily and economically, has the same advantages as the hair dye according to the first aspect of the present invention. The dye has a further advantage that it can be manufactured more easily and economically.
A fourth aspect of the present invention Is characterized in that, in the foregoing hair dye, the formulation (ii) primarily composed of the &bgr;-glucosidase enzyme component is one selected from the group consisting of a juice of a fresh indigo leaf, a &bgr;-glucosidase-containing powder obtained by freeze-dried fresh indigo leaves or juice thereof, and a mixture thereof.
The hair dye according to the fourth aspect of the present invention, which uses the component (ii) which is not only highly stable but can also be obtained easily and economically, has the same advantages as the hair dye according to the first aspect of the present invention. The dye has a further advantage that it can be manufactured more easily and economically.
A fifth aspect of the present invention is characterized in that, the foregoing hair dye further comprises another dye material selected from the group consisting of a natural plant dyestuff of gamene, curcuma, sappanwood, cochineal, logwood, henna, Castanea (chestnut tree),
Allium cepa
(onion) or coffee, an extract thereof, a powder obtained by freeze-drying the extract, and a mixture thereof.
The hair dye according to the fifth aspect of the present invention can provide widened variation in colors, since it contains other dye materials as described above.
A sixth aspect of the present invention is char

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