Applicator for applying an oxidative hair dye and method of repeatedly dyeing individual hair strands uniformly or non-uniformly with same
View Patent ↗The method of oxidative dyeing of individual hair strands includes providing an applicator with a first and second compartment containing an oxidative hair dye composition and an oxidizing agent respectively and respective liquid-permeable inserts. The two compartments are provided with respective product-dispensing openings, which open next to each other into a product-dispensing area. The liquid-permeable inserts protrude somewhat beyond the product-dispensing openings and are made of spongy material, bristles, or a fabric. At least a portion of a hair strand to be dyed is wet with the oxidative hair dye composition and the oxidizing-agent-containing solution from the liquid-permeable inserts so that a reactive hair dyeing mixture is formed on the hair strand. The hair dyeing mixture is worked or massaged into the hair strand by hand. The individual hair strand may be uniformly dyed or dyed in a point-like or spot-like pattern.
1. A method of oxidative dyeing of individual hair strands of human head hair, said method comprising the steps of:
a) providing an applicator comprising a first compartment, a second compartment arranged next to the first compartment, an oxidative hair dye composition contained in the first compartment, an oxidizing agent contained in the second compartment, and respective liquid-permeable inserts arranged in said first compartment and said second compartment; wherein said first compartment and said second compartment are provided with respective product-dispensing openings that open next to each other into a product-dispensing area or spot, said respective liquid-permeable inserts protrude beyond said product-dispensing openings, and said liquid-permeable inserts ( 7 , 8 ) each comprise a spongy material, bristles, or a fabric so that the oxidizing agent and the oxidative hair dye composition can flow through the inserts;
b) wetting at least a portion of a hair strand to be dyed with the oxidative hair dye composition and the oxidizing agent from the respective liquid-permeable inserts so that a reactive hair dyeing mixture forms on said at least a portion of said hair strand;
c) working or massaging the reactive hair dyeing mixture into said at least a portion of said hair strand by hand in order to uniformly mix the oxidative hair dye composition and the oxidizing agent on said at least a portion of said hair strand to uniformly dye said at least a portion of said hair strand; and
d) repeating steps b) and c) for other hair strands and/or other portions of said hair strand until the dyeing of the hair strands is complete.
2. The method as defined in claim 1 , further comprising moving the applicator continuously over said hair strand to be dyed to uniformly and entirely dye the hair strand to be dyed.
3. The method as defined in claim 1 , further comprising moving the applicator only over spaced-apart regions of said hair strand in order to achieve a point-like or spot-like dyeing of the hair strand to obtain a predetermined pattern.
4. The method as defined in claim 1 , further comprising dividing the hair strand to be dyed into respective equal sections and wetting only one of the sections of the hair strand with the oxidative hair dye composition and the oxidizing agent from said respective liquid-permeable inserts and repeating the dividing and wetting for other adjacent hair strands, so that alternating dyed and not-dyed sections of the hair are formed.
5. The method as defined in claim 1 , wherein the applicator includes a removable protective cap that closes the product-dispensing openings when placed over the product-dispensing openings in order to be able to repeatedly dispense partial amounts of the oxidative hair dye composition and the oxidizing agent at various times over an extended time interval, and further comprising using the applicator to dye a first group of said hair strands at one time and then a second group of hair strands at another later time.
6. The method as defined in claim 1 , wherein the applicator includes detachable covering foils connected in a liquid-tight manner with walls of the first compartment and the second compartment so that the product-dispensing openings are closed, and further comprising removing the covering foils in order to open the product-dispensing openings prior to the wetting of the at least a portion of the hair strand with the oxidative hair dye composition and the oxidizing agent.
7. The method as defined in claim 6 , wherein said covering foils comprise a strip or tab for easy removal of the covering foils from the product-dispensing openings.
8. The method as defined in claim 1 , wherein the first compartment is cylindrical and the second compartment surrounds the first compartment and has an annular cross-section, and further comprising keeping the first compartment separate from said second compartment prior to the wetting of the at least a portion of the hair strand with the oxidative hair dye composition and the oxidizing agent.
9. The method as defined in claim 1 , wherein said oxidizing agent is a peroxide solution.