An applicator for applying a product to hair, especially a hair colouring product, including: at least one first row of teeth extending longitudinally over a distance l.sub.1, from a first application face of the applicator; and a plurality of second rows of teeth, extending longitudinally over a distance l.sub.1, from a second application face of the applicator, which is arranged opposite the first application face, the ratio l.sub.1/l.sub.2 being lower than or equal to 0.75.

A method and device for selectively entraining hair strands from the scalp having at least one hooking applicator, the at least one hooking applicator employing a hook that rotates to entrain the hair strands, a hair color container having hair color therein and a way to apply the hair color to the entrained hair stands includes a hooking applicator, hair color container, and trigger mechanism. The trigger mechanism operates to entrain hair using the hooking application and apply hair color to the hair from the hair color container.

A device for selectively entraining hair strands from the scalp has at least one hooking applicator, the at least one hooking applicator employing a hook that rotates to entrain the hair strands, a hair color container having hair color therein and a way to apply the hair color to the entrained hair stands. The at least one hooking applicator forms a channel between a surface of the hook and a surface of a body portion of the at least one hooking applicator having a hair color outlet therein to better accommodate high viscosity liquid hair color. The hook and/or the at least one hooking applicator includes a recess to hold entrained hair and permit hair color to fill the recess for application. A trigger mechanism first rotates the hook to entrain hair strands and then squeezes the hair color container to apply hair color to the entrained hair.

Hair care product applicators and systems and methods thereof, are described herein. The hair care product applicator can have multiple platforms configured to hold, table, or confine respective portions of a group of strands of hair, where a first platform is configured to hold a first portion of the group of strands of hair, and a second platform, which can be spaced apart from the first platform, is configured to hold a second portion of the group of strands of hair. The second portion of the group of stands of hair can correspond to the entire group of stands of hair, and the first portion of the group of strands of hair can correspond to less than the entire group of strands of hair. An amount of hair care product can be discharged via a discharge opening for application to at least part of the group of stands of hair.

A dispenser for dispensing liquids into the hair is provided having a body with a handle and an arch shaped portion. Teeth extending from the body in the arch shaped portion are configured to disburse liquid from openings at distal ends thereof. A liquid supply positioned in a cavity of a handle on one end of the body is communicated under pressure to the openings in the teeth, by compression of flexible sidewalls of the handle.

Described herein are methods for applying a color-altering material to the roots of the hair which reduce the amount of time needed between color applications. The color-altering material is applied horizontally with respect to the hair, and the natural color of the hair is left intact between the color-altering sessions. The methods of this disclosure incorporate the root growth into the overall color pattern of the hair, allowing a user to wait for a longer period of time in between color applications.

Described herein are methods for applying a color-altering material to the roots of the hair which reduce the amount of time needed between color applications. The color-altering material is applied horizontally with respect to the hair, and the natural color of the hair is left intact between the color-altering sessions. The methods of this disclosure incorporate the root growth into the overall color pattern of the hair, allowing a user to wait for a longer period of time in between color applications.

The instant disclosure relates to hair coloring base compositions and developer compositions that can be incorporated into a hair color cartridge, which combines the compositions and dispenses them onto hair. The hair color cartridge includes: (a) one or more hair coloring base compositions and; (b) one or more developer compositions, which can be combined to form an active hair coloring composition and dispensed onto hair. The hair coloring base compositions typically include one or more oxidative dye precursors; one or more alkalizing agents; one or more reducing agents; optionally, one or more cationic conditioning polymers; one or more surfactants; one or more water-soluble solvents; and water. The developer compositions typically include one or more oxidizing agents; one or more surfactants; and water. The unique components and fluid characteristics of the various compositions are such that devices or appliances comprising them accurately combine and dispense the hair coloring base composition(s) with the developer composition(s) in a predetermined ratio with excellent consistency for application to hair.

The instant disclosure relates to hair coloring base compositions and developer compositions that can be incorporated into a hair color cartridge, which combines the compositions and dispenses them onto hair. The hair color cartridge includes: (a) one or more hair coloring base compositions and; (b) one or more developer compositions, which can be combined to form an active hair coloring composition and dispensed onto hair. The hair coloring base compositions typically include one or more oxidative dye precursors; one or more alkalizing agents; one or more reducing agents; optionally, one or more cationic conditioning polymers; one or more surfactants; one or more water-soluble solvents; and water. The developer compositions typically include one or more oxidizing agents; one or more surfactants; and water. The unique components and fluid characteristics of the various compositions are such that devices or appliances comprising them accurately combine and dispense the hair coloring base composition(s) with the developer composition(s) in a predetermined ratio with excellent consistency for application to hair.

A valve system comprises: a valve body; a valve cap; and a valve plug between the valve body and valve cap is compressed radially and axially, and a central bore extends wholly through the valve body and valve cap and partially through the valve plug. The valve system is welded to a packet which can contain a hair color formula. One or more of the packets are then used in a cartridge compatible with a dispensing device.