Improvements in or relating to hair and scalp care

Abstract

A two-part composition for treating hair which comprises (a) a first composition comprising an acidic exfoliant; and (b) a second composition comprising a hair treatment agent and an anthocyanin dye;

Description

The present invention relates to a two-part composition for hair treatment. Despite considerable amounts of research into compositions for hair treatment, problems with them remain. Issues include the build-up of hair treatment products on a scalp of a hair treatment product user; oxidative stress as well as inflammation around hair follicles and on the scalp caused by free radicals; and poor scalp pH balance which causes bacterial growth. A way to ameliorate these problems has been sought. According to the invention there is provided a two-part composition for treating hair which composition comprises (a) a first composition comprising an acidic exfoliant; and (b) a second composition comprising a hair treatment agent and an anthocyanin dye; wherein the pH of composition (a) is lower than the pH of composition (b) such that the colour of the anthocyanin dye changes on contact with composition (a) wherein the two-part composition when mixed has a balanced acidic pH to help maintain the natural scalp environment. According to the invention there is also provided a method of hair and / or scalp treatment wherein the method comprises the steps of (i) applying a first composition comprising an acidic exfoliant to the hair and / or scalp; and (ii) applying a second composition comprising a hair treatment agent and an anthocyanin dye to the hair and / or scalp; wherein the pH of the first composition (a) is lower than the pH of the second composition (b) such that the colour of the anthocyanin dye changes on contact with the first composition (a); and wherein the two-part composition when mixed has a balanced acidic pH to help maintain the natural scalp environment. Advantages of the invention include that the inclusion of an acidic exfoliant reduces the build-up of hair treatment products on a scalp and that the anthocyanin dye has an antioxidant effect which reduces oxidative stress and inflammation of the scalp and hair follicles. Furthermore, the balanced pH of the composition helps to reduce bacterial growth on the scalp. In some embodiments, the balanced acidic pH is from 3 to 6. In some embodiments, the balanced acidic pH is from 4 to 5.5. In some embodiments, the balanced acidic pH is from 4.5 to 6. In some embodiments, the balanced acidic pH is from 4.5 to 5.5. First composition: Acidic exfoliant In some embodiments, the acidic exfoliant may be an organic acid. In some embodiments, the acidic exfoliant may be an alpha hydroxy acid. In some embodiments, the acidic exfoliant may be glycolic acid, lactic acid, malic acid, tartaric acid, hydroxycaprylic acid, hydroxycapric acid, salicylic acid, and / or citric acid. In some embodiments, the first composition may comprise from 5 to 15% by weight of the acidic exfoliant. It should be understood herein that percentages by weight are percentages by weight in relation to the total weight of the first or second composition. In some embodiments, the first composition may comprise from 7 to 13% by weight of the acidic exfoliant. In some embodiments, the first composition may comprise about 10% by weight of the acidic exfoliant. Anti-inflammatory In some embodiments, the first composition may comprise an anti-inflammatory agent. In some embodiments, the anti-inflammatory agent may be one or more naturally occurring anti-inflammatory agents such as a substance that reduces redness and / or itching. Examples of suitable naturally occurring anti-inflammatory agents include an extract or distillation from: witch hazel, chamomile, aloe vera, Motsuyakuju, Akane, Yanagi, Yanagi herb, Oat wheat, Calendula, Arnica, Otogirisou, Watermelon, Rosemary, Passflower, Mansaku, Ginger, and Echinacea. In some embodiments, the naturally occurring anti-inflammatory agent may be witch hazel, chamomile, aloe vera, oat, kinsenka, arnica, watermelon, rosemary, mansaku, ginger or echinacea. In some embodiments, the antiinflammatory agent may be a pure material, for example a-Visabolol, apigenin, apigenin-7-glucoside, gingerol, gingerol, gingerdiol, dehydrogingerzion, parador, natural or naturally derived avenanthramide (for example tranilast, avenanthramide A, avenanthramide B, avenanthramide C), non-naturally occurring avenanthramide (for example dihydroavenanthramide D, dihydroavenanthramide E, avenanthramide D, avenanthramide E, avenanthramide F, boswellic acid, phytosterols, glycyridine, glabridin, lycochalcone A, a-bisabolol, natural avenanthramide, non-natural avenanthramide (for example, dihydroavenanthramide D (described in WO 2004 / 047833)), boswellic acid, phytosterol, glycyridine, lycochalcone A, allantin, pantenol, lanolin, (pseudo) ceramide [for example ceramide 2, hydroxypropylbispalmitamide MEA, cetyloxypropyl glycerylmethoxypropylmyristamide, N-(l-hexadecanoyl)-4-hydroxy-L-Proline (1-hexadecyl) ester, hydroxyethyl palmityloxyhydroxypropyl palmitamide], glycosphingolipide, phytosterols, chitosan, mannose, lactose and / or p-glucan, (for example 1,3-1,4-derived from oat wheat P-Glucan). In some embodiments, the first composition may comprise from 5 to 15% by weight of an antiinflammatory agent. In some embodiments, the first composition may comprise from 7 to 13% by weight of an anti-inflammatory agent. In some embodiments, the first composition may comprise about 10% by weight of an anti-inflammatory agent. Hydrosol In some embodiments, the first composition may comprise a hydrosol. In some embodiments, the hydrosol may be floral water. In some embodiments, the hydrosol may be an essential oil distillate. In some embodiments, the hydrosol may be a distillate or floral water of neroli, eucalyptus, cedarwood, geranium, orange, lavender, rosemary, basil, bergamot, cypress, grapefruit, lemon, frankincense, palmarosa, sandalwood, thyme, Roman chamomile, sage, horsetail, clary sage, Tea Tree, and / or patchouli essential oil. In some embodiments, the hydrosol may be a distillate or floral water of neroli and / or lemon. Advantages of including a hydrosol include that a hydrosol provides gentle cleansing, anti-inflammatory properties, as well as a natural fragrance. In some embodiments, the first composition may comprise from 10 to 30% by weight of a hydrosol. In some embodiments, the first composition may comprise from 15 to 25% by weight of a hydrosol. In some embodiments, the first composition may comprise about 20% by weight of a hydrosol. Moisturiser In some embodiments, the first composition may comprise a moisturiser. In some embodiments, the moisturiser may be a moisturiser capable of filling a damaged portion of skin or hair, such as an extracts derived from a natural materials such as an animal, plant, and / or mineral extract; for example an amino acid, peptide, protein, sugar, and / or vitamin. For example, the moisturiser may be aloe vera, PPG-arginine, glycerin, propylene glycol, butylene glycol, dipropylene glycol, caprylyl glycol, diglycerin, methyl gluceth, ethoxydiglycol, glycereth, propanediol, diethoxydiglycol pyrrolidone carboxylic acid, sodium lactate, sodium PCA, mineral oil, lanolin, jojoba oil, olive oil, glycosphingolipids, phospholipids, lipid composites, isononyl isononanoate, betaines, carboxymethyl chitin, ceramides, glucosylceramide, glycosaminoglycans, alpha-glucans, hyaluronic acid, hydrolyzed hyaluronic acid, betaines, chitosan, chitosan succinamide, vitamin E (tocopherols), urea, hydroxyethyl urea, glucosides, gamma PGA, xylitylglucoside, xylitol, pentaerythrityl tetraisostearate, sodium chondroitin sulfate, chondroitin-4-sulfate, atelocollagen, beta-glucan, PEG, pyridoxine tris-hexyl decanoate, potassium PCA, sodium polygamma-glutamate, polyglutamic acid, glyceryl polyacrylate, galactoarabinan, polyglycerin-3 crosspolymer, sodium hyaluronate, bis-PEG-18 methyl ether dimethyl silane, bis-ethoxydiglycol succinate, lecithin, ascorbyl tetraisopalmitate, glycosyl trehalose, hydrogenated starch hydrolysate, 1,2-hexanediol, mannitol, arginine, serine, sucrose, PCA, citrulline, glycogen, histidine HCI, alanine, threonine, glutamic acid, lysine HCI, phosphate buffered saline, creatine, cholesteryl isostearate, cholesteryl chloride, cholesteryl nonanoate, butylhydroxytoluene (BHT), sodium dilauramidoglutamide lysine, maltodextrin, polyquaternium-39, cholecalciferol PEG-12 ether, saccharide isomerate, sorbitol, and / or derivatives thereof. In some embodiments, the moisturising component may be a water-soluble or water-insoluble vitamin; for example vitamin Bl, B2, B5, B6, B12, C, pantothenic acid, pantothenyl ethyl ether, panthenol, biotin and / or a biologically active component or derivative thereof, and / or vitamin A, D, E, and / or a derivative thereof. In some embodiments, the moisturising component may be a water-soluble and / or a water-insoluble amino acid; for example, asparagine, alanine, indole, glutamic acid and their salts, and tyrosine, tryptamine, lysine, histadine and their salts. In some embodiments, the moisturiser may be a non-oily moisturiser such as aloe vera and / or hyaluronic acid. Advantages of non-oily moisturisers include that bacterial growth is reduced. In some embodiments, the first composition may comprise from 3 to 15% by weight of a moisturiser. In some embodiments, the first composition may comprise from 6 to 12% by weight of a moisturiser. In some embodiments, the first composition may comprise about 8% by weight of a moisturiser. Diluent In some embodiments, the first and / or second composition may comprise a diluent. In some embodiments, the diluent may include a solvent. In some embodiments, the diluent may be water and / or a lower alkyl alcohol. In some embodiments, the diluent may be water. In some embodiments, where the amount of the ingredients of the first composition comprises, consists essentially of, or consists of less than 100% by weight, the rest of the first composition comprises, consists essentially of, or consists of a diluent. In some embodiments, the solvent may be an alkyl diol. In some embodiments, the solvent may be a lower alkyl diol. In some embodiments, the solvent may be a lower alkyl diol having from one to eight carbon atoms, for example from two to four carbon atoms. In some embodiments, the solvent may be propane diol. Excipients In some embodiments, the first and / or second composition may comprise one or more excipients. In some embodiments, an excipient may be one or more of a UV filter, a pearling agent, a preservative, a preservation-enhancing agent, an antifungal agent a buffer agent, a dye, and / or a thickening agent. In some embodiments, the first and / or second composition may comprise from 3 to 15% by weight of the excipient. In some embodiments, the first and / or second composition may comprise from 6 to 12% by weight of the excipient. In some embodiments, the first and / or second composition may comprise about 8% by weight of the excipient. UV Filter In some embodiments, the excipient may comprise a UV absorber. In some embodiments, the UV absorber may be p-aminobenzoic acid-p-Aminobenzoic acid ethyl ester (25 mol) (ethoxylation, INCI name: PEG-25 PABA), p-dimethylaminobenzoic acid-2-ethylhexyl ester-p-aminobenzoic acid ethyl ester (N-propoxylation degree: 2 mol), p-aminobenzoic acid glycerol ester-Salicylic acid homomentyl ester (homosalate) (Neo Heliopan (registered trademark) HMS), salicylic acid 2-ethylhexyl ester (Neo Heliopan (registered trademark) OS), triethanolamine salicylate 4-isopropylbenzyl salicylate anthranilic acid mentyl ester (Neo Heliopan (registered trademark) MA), diisopropyl cinnamic acid ethyl ester p-methoxycinnamic acid-2-ethylhexyl ester (Neo Heliopan (registered trademark) AV), diisopropyl cinnamate methyl ester p-methoxycinnamate isoamyl ester (Neo Heliopan (registered trademark) E 1000), -p-methoxycinnamic acid diethanolamine salt-p-methoxycinnamate isopropyl ester 2-phenylbenzimidazole sulfonic acid and its salt (Neo Heliopan (registered trademark) Hydro), 3-(4'-trimethylammonium) benzylidenebornan-2-onemethylsulfate, p-imidazole-4 (5) -acrylic acid (urocanic acid) 3- (4'-Sulfon) benzylidene bornan-2-one and its salts, -3-(4'-Methylbenzylidene) -D, L-camphor (Neo Heliopan® MBC), 3-benzylidene-D, L-Phenyl N-[(2 and 4)-(2- (oxoboron-3-ylidene) methyl] benzyl] acrylamide polymer, 4,4'-[(6- [4- (6- [4- (6-( 1,1-dimethyl) aminocarbonyl) phenylamino]] -l,3,5-triazine-2,4-diyl) diimino] bis- (benzoic acid-2-ethylhexyl ester) (Uvasorb® HEB), benzylidene malonate polysiloxane (Parsol® SLX), ethyl cinnamate glyceryl dimethoxycinnamate, dipropylene glycol salicylate, tris (2-ethylhexyl) -4,4'-4"-(l,3,5-triazine-2,4,6-triltriimino) tribenzoate (= 2,4,6-trianilino- (p) -Carbo-2'-ethylhexyl-l'-oxy) -1,3,5-triazine) (Uvinul® T150), and / or a mixture of diethylhexyl syringylidenemalonate, butyl methoxydibenzoylmethane, and ethylhexyl salicylate. In some embodiments, the excipient may comprise from 0.1 to 1% by weight of the UV absorber. In some embodiments, the excipient may comprise from 0.2 to 0.8% by weight of the UV absorber. In some embodiments, the excipient may comprise about 0.2% or about 0.5% by weight of the UV absorber. Pearling agent In some embodiments, the excipient may comprise a pearling agent. In some embodiments, the pearling agent may comprise an ethylene glycol monoalkyl ester, an ethylene glycol dialkyl ester, an ethylene glycol monoalkyl ether, and / or an ethylene glycol dialkyl ether. Examples of the ethylene glycol monoalkyl ester include an ethylene glycol monostearyl ester and an ethylene glycol monobehenyl ester. Examples of the ethylene glycol dialkyl ester include an ethylene glycol distearyl ester and an ethylene glycol dibehenyl ester. Examples of the ethylene glycol monoalkyl ether include ethylene glycol monostearyl ether. Examples of the ethylene glycol dialkyl ether include ethylene glycol distearyl ether. In some embodiments, the first composition may comprise from 0.1 to 10% by weight, for example from 0.5 to 5% by weight, e.g. from 1 to 4% by weight of the pearling agent. In some embodiments, the pearling agent may improve a stability of the shampoo and a smoothness upon foaming and rinsing. In some embodiments, the excipient may comprise from 1 to 10% by weight of the pearling agent. In some embodiments, the excipient may comprise from 2 to 8% by weight of the pearling agent. In some embodiments, the excipient may comprise about 4% by weight of the pearling agent. Preservative In some embodiments, the excipient may comprise a preservative, a preservation-enhancing agent, and / or an antifungal agent. For example, a suitable preservative may include a substance listed in the International Dictionary and Handbook of Cosmetic Ingredients, Sixteenth Edition, under the function "preservatives." In some embodiments, the preservative may be phenoxyethanol, parabens (e.g. benzylparaben, butylparaben, ethylparaben, isobutylparaben, isopropylparaben, methylparaben, propylparaben), iodopropynyl butyl carbamate, methyldibromoglutaronitrile, DMDM hydantoin, benzyl alcohol, piroctone olamine, pentanediol, benzoic acid / sodium benzoate, sorbic acid / potassium sorbate, and / or an organic acid to provide antimicrobial protection. In some embodiments, the preservation-enhancing agent may be anisic acid, lactic acid, sorbitan caprylate, ethylhexylglycerin, caprylyl glycol, octanediol, and mixtures thereof. In some embodiments, the first composition may be substantially free of parabens. In some embodiments, the first composition may comprise an antifungal agent. In some embodiments, the antifungal agent may be ketoconazole, oxiconazole, bifonazole, butoconazole, croconazole, clotrimazole, econazole, enilconazole, fenticonazole, isoconazole, miconazole, sulconazole, tioconazole, fluconazole, itraconazole, terconazole, Naftifine, terbinafine, zinc pyrithione, piroctone olamine (Octopirox® 1, (RS)-l-(4-chlorophenoxy)-l-imidazol-l-yl-3,3-dimethylbutan-2-one (climbazole) and mixtures thereof. In some embodiments, the excipient may comprise from 0.01 to 5.0% by weight, for example from 0.05% to 1.0% by weight, e.g. from 0.1% to 1.0% by weight of at least one preservative, preservationenhancing agent, and / or antifungal agent. Buffering agent In some embodiments, the excipient may comprise a buffering agent. In some embodiments, the buffering agent may be a buffer salt. In some embodiments, the buffering agent may be an alkali metal salt of a weak organic or inorganic acid such as a citrate, acetate, carbonate, and / or phosphate. In some embodiments, the excipient may comprise from 0.1 to 1% by weight of the buffering agent. In some embodiments, the excipient may comprise from 0.2 to 0.6% by weight of the pearling agent. In some embodiments, the excipient may comprise about 0.4% by weight of the pearling agent. Dye In some embodiments, the first composition may comprise a dye. In some embodiments, the dye may be a fluorescent dye. In some embodiments, the excipient may comprise from 0.01 to 0.1% by weight of the dye. In some embodiments, the excipient may comprise from 0.02 to 0.06% by weight of the dye. In some embodiments, the excipient may comprise about 0.02% by weight of the pearling agent. Thickening agent In some embodiments, the excipient may comprise a thickening agent. In some embodiments, the thickening agent may be a thickening agent specified on the INCI list. In some embodiments, the thickening agent may be oleic acid, cetyl alcohol, oleyl alcohol, sodium chloride, cetearyl alcohol, stearyl alcohol, synthetic thickeners such as Carbopol and Glucamate™ (The Lubrizol Corp, USA), Aculyn polymers (Rohm and Haas, USA), a gum, and / or a non-cellulosic polysaccharide (such as a natural gum, e.g. Caesalpinia Spinosa Gum). In some embodiments, the excipient may comprise from 0.5 to 5% by weight of the thickening agent. In some embodiments, the excipient may comprise from 0.7 to 2% by weight of the thickening agent. In some embodiments, the excipient may comprise about 1% by weight of the thickening agent. Colour change shampoo In some embodiments, the hair treatment agent may comprise a conditioner and / or a surfactant. Conditioner In some embodiments, the hair treatment agent may be a conditioner. In some embodiments, the conditioner may be a silicone-based conditioning shampoo and / or a hydrolysed protein based conditioning cleanser. In some embodiments, the hydrolysed protein based conditioning cleanser may be a hydrolysed natural (plant or animal based) protein and / or a synthetic protein. In some embodiments, the hydrolysed protein based conditioning cleanser may be plant keratin. In some embodiments, the silicone-based conditioning shampoo may be a polydimethylsiloxane represented by the following general formula: R(CH3)2SiO-[(CH3)2SiO]m-Si(CH3)2R wherein R is methyl or hydroxyl; and m is a number of 1 to 20,000; an amino-modified silicone; and / or a polyether-modified silicone, methylphenyl polysiloxane, fatty acid-modified silicone, alcohol-modified silicone, alkoxy-modified silicone, epoxy-modified silicone, fluorine-modified silicone, cyclic silicone and / or an alkyl-modified silicone. In some embodiments, the amino-modified silicone may have an average molecular weight of about 3,000 to 100,000 which are described under the name "Amodimethicone" in the CTFA dictionary (Cosmetic Ingredient Dictionary; US), the 3rd edition. In some embodiments, the second composition may comprise from 1 to 20% by weight of the conditioner. In some embodiments, the second composition may comprise from 2 to 10% by weight of the conditioner. In some embodiments, the second composition may comprise about 4% by weight of the conditioner. Anthocyanin dye In some embodiments, the anthocyanin dye may be a plant dye. In some embodiments, the anthocyanin dye may be obtained from leaves, berries (e.g. blackcurrant, blueberry, cranberry, bilberry, raspberry, cherry, elderberry), fruits (e.g. grapes, mulberries, tropical fruits, currants), seeds (e.g. sunflower seed, black cowpea coat), vegetables (e.g. red cabbage extract, broccoli, onion outer skins, purple sweet potato, egg plant, black rice, ube), and / or flowers (violet petals or butterfly pea (Clitoria tematea or Clitoria mariana)). In some embodiments, the second composition may comprise from 10 to 50% by weight of the anthocyanin dye. In some embodiments, the second composition may comprise from 20 to 40% by weight of the anthocyanin dye. In some embodiments, the second composition may comprise about 30% by weight of the anthocyanin dye. Surfactant In some embodiments, the hair treatment agent may be a surfactant. In some embodiments, the surfactant may be a cleansing agent and / or a foaming agent. In some embodiments, the second composition may comprise an anionic surfactant, non-ionic surfactant, and / or an amphoteric surfactant. Examples of suitable anionic surfactants include an alkyl sulfate, alkyl ether sulfate, alkylaryl sulphonate, alkanoyl isothionate, alkyl succinate, alkyl sulphosuccinate, alkyl ether sulphosuccinate, N-alkyl sarcosinate, alkyl phosphate, alkyl ether phosphate, alkyl ether carboxylic acid and / or a salt thereof (for example an inorganic salt such as an alkali metal salt (e.g. sodium) and / or an alkaline earth metal salt (e.g. magnesium); and / or an organic salt such as ammonium or mono-, di- or triethanolamine salts). In some embodiments, the alkyl and acyl groups may contain from 8 to 18, for example from 10 to 16, carbon atoms. In some embodiments, the alkyl and acyl groups may be unsaturated. In some embodiments, the alkyl ether sulfate, alkyl ether sulphosuccinate, alkyl ether phosphate, alkyl ether carboxylic acid and / or a salt thereof may contain from 1 to 20 ethylene oxide or propylene oxide units per molecule. In some embodiments, an anionic surfactant may be selected from sodium oleyl succinate, ammonium lauryl sulphosuccinate, sodium lauryl sulfate, sodium lauryl ether sulfate (also known as sodium laureth sulfate, SLES), sodium lauryl ether sulphosuccinate, ammonium lauryl sulfate (ALS), ammonium lauryl ether sulfate (ammonium laureth sulfate), sodium dodecylbenzene sulphonate, triethanolamine dodecylbenzene sulphonate, sodium cocoyl isethionate, sodium lauryl isethionate, lauryl ether carboxylic acid and sodium N-lauryl sarcosinate or mixtures thereof. Preferred anionic surfactants are sodium lauryl sulfate, sodium lauryl ether sulfate (n) EO, (where n is from 1 to 4, in particular n is 3), sodium lauryl ether sulphosuccinate (n) EO, (where n is from 1 to 4, in particular n is 3), ammonium lauryl sulfate, ammonium lauryl ether sulfate (n) EO, (where n is from 1 to 4, in particular n is 3) or mixtures thereof. In some embodiments, the anionic surfactant may be sodium lauryl sulfate, ammonium lauryl sulfate, sodium lauryl ether sulfate, ammonium lauryl ether sulfate, sodium lauroyl sarconisate, sodium oleylsuccinate, ammonium lauryl sulfosuccinate, sodium dodecylbenzol sulfonate and / or triethanolamine dodecylbenzol sulfonate. In some embodiments, the anionic surfactant may be sodium lauryl sulfate, ammonium lauryl sulfate, sodium lauryl ether sulfate (also known as sodium Laureth sulfate) and / or ammonium lauryl ether sulfate. In some embodiments, the anionic surfactant may be sodium lauryl sulfate e.g. available as Steol CS230-HA. Examples of the nonionic surfactant include a polyoxyalkylene sorbitan fatty ester, polyoxyalkylene sorbitol fatty ester, polyoxyalkylene glycerol fatty ester, polyoxyalkylene fatty ester, polyoxyalkylene alkyl ether, polyoxyalkylene alkyl phenyl ether, polyoxyalkylene (hardened) castor oil, sucrose fatty ester, polyglycerol alkyl ether, polyglycerol fatty ester, fatty acid alkanol amide, alkyl glycoside, monoalkyl glyceryl ether and / or monoalkenyl glyceryl ethers. In some embodiments, the nonionic surfactant may be an alkyl glycoside, polyoxyalkylene (C8 to C20) fatty ester, polyoxyethylene sorbitan fatty ester, polyoxyethylene hardened castor oil, fatty acid alkanol amide, monoalkyl glyceryl ether and / or monoalkenyl glyceryl ether. Examples of the amphoteric surfactant include a betaine-based surfactant. In some embodiments, a betaine-based surfactant may be an alkyldimethyl aminoacetic acid betaine, fatty amide propyl betaine and / or an alkylhydroxysulfobetaine. In some embodiments, a betaine-based surfactant may be a fatty amide propyl betaine. In some embodiments, a betaine-based surfactant may be a fatty amide propyl betaine may contain an acyl group having from 8 to 18 carbon atoms, for example from 10 to 16 carbon atoms. In some embodiments, a betaine-based surfactant may be a fatty amide propyl betaine may be lauramide propyl betaine, palm kernel oil fatty amide propyl betaine and / or coconut oil fatty amide propyl betaine. In some embodiments, the second composition may comprise from 10 to 50% by weight of the surfactant. In some embodiments, the second composition may comprise from 20 to 40% by weight of the surfactant. In some embodiments, the second composition may comprise about 33% by weight of the surfactant. In some embodiments, the first composition may comprise: from 5 to 15% by weight of the acidic exfoliant; optionally from 5 to 15% by weight of an anti-inflammatory agent; optionally from 10 to 30% by weight of a hydrosol; optionally from 3 to 15% by weight of a moisturiser; optionally from 3 to 15% by weight of an excipient; wherein the balance of the first composition is a diluent; wherein the hair treatment agent comprises a conditioner and / or a surfactant and / or wherein the second composition comprises: from 1 to 20% by weight of a conditioner; from 10 to 50% by weight of a surfactant; from 10 to 50% by weight of the anthocyanin dye; optionally from 3 to 15% by weight of an excipient; wherein the balance of the second composition is a diluent. The invention will now be illustrated with reference to the following Examples which are not intended to limit the scope of the claimed invention. In the Examples, the following ingredients are used which are identified by their trade name, their ingredients which are identified by their INCI (International Nomenclature Cosmetic Ingredient) names (which are listed in parentheses), and their supplier. The Phase A ingredients for Example 1 are as follows. The diluent was distilled water (aqua) supplied by Pure Klenz. The first moisturiser was Aloe Vera 200:1 powder (Aloe Barbadensis leaf juice powder) from New Directions UK. The anti-inflammatory agent was witch hazel distillate (Hamamelis Virginiana (Witch Hazel), water, benzoic acid) from Bay House Ingredients. The first hydrosol was Neroli Hydrosol (Citrus aurantium Floral Water) from New Directions UK. The second hydrosol was Lemon Hydrosol (Citrus Limon Water) from New Directions UK. The acidic exfoliant was AHA Extract 44 Glycerin (Aqua, Glycerin, Citric Acid, Lactic Acid, Glycolic Acid, Malic Acid, Tartric Acid, Citrus Medica Limonum Fruit Extract, Pyrus Malus Fruit Extract, Saccharrum Officinarum Extract, Vaccinium Myrtillus Fruit Extract, Vitis Vinifera Fruit Extract) from Infinity Ingredients. The solvent was Zemea Propanediol (propanediol) from IMCD. The second moisturiser was Pro Vitamin B5 (panthenol) from New Directions UK. The fluorescent dye was Unicert red K7054-J (Cl 45410 [Red 28]) from Adina Cosmetic Ingredients. The thickening agent was Cobiogum (Caesalpinia Spinosa Gum) from IMCD. The pearling agent was Tego Pearl N 300 (glycol distearate, Laureth-4, cocamidopropyl betaine) from Surfachem. The third moisturiser was Aquaxyl (xylitylglucoside, anhydroxylitol, and xylitol) from Seppic. The Phase B ingredients for Example 1 are as follows. The UV absorber was Covabsorb DS (diethylhexyl syringylidenemalonate, butyl methoxydibenzoylmethane, and ethylhexyl salicylate) from Adina Cosmetic Ingredients. The non-ionic surfactant was PEG-40 Hydrogenated Castor Oil (PEG-40 hydrogenated castor oil) from New Directions UK. The preservative was Lemon Cold Pressed Essential Oil (Citrus limonum Oil) from New Directions UK. The Phase C ingredient for Example 1 is as follows. The preservative was Microcare PHC (phenoxyethanol, chlorphenesin, aqua, and glycerin) from Thor. The Phase D ingredient for Example 1 is as follows. The buffering agent was Sodium Hydroxide Crystals (sodium hydroxide) from GCD. The Phase A ingredients for Example 2 are as follows. The diluent was distilled water (aqua) supplied by Pure Klenz. The conditioner was AC Plant Keratin PF (hydrolysed corn protein, hydrolysed wheat protein, hydrolysed soy protein, leuconostoc / radish root ferment filtrate) from Adina Cosmetic Ingredients. The moisturiser was Pro Vitamin B5 (panthenol) from New Directions UK. The buffering agent was sodium citrate (sodium citrate) from Special Ingredients. The anthocyanin dye was Butterfly Blue-GLR* 1% (Glycerin, Aqua, Clitoria ternatea (butterfly pea) flower extract) from The Secrets of Caledonia. The acidic exfoliant was 30% Citric Acid Solution (aqua, citric acid) from GCD. The Phase B ingredients for Example 2 are as follows. The first surfactant was Steol CS230-HA (sodium laureth sulfate) from Sufachem. The second surfactant was Cocamidopropyl Betaine (cocamidopropyl betaine) from Naturally Thinking. The Phase C ingredient for Example 2 is as follows. The conditioner was Dowsil 5-7113 Silicone Quat Emulsion (a 22% nonionic emulsion of a cationized aminofunctional silicone polymer: silicone quaternium-16, undeceth-11, butyloctanol, and undeceth-5) from Univar. The Phase D ingredient for Example 2 is as follows. The thickening agent was Crothix Liquid (PEG-150 pentaerythrityl tetrastearate, aqua, PEG-6 caprylic / capric glycerides) from Croda / The Soap Kitchen. The Phase E ingredient for Example 2 is as follows. The preservative was Microcare PHC (phenoxyethanol, chlorphenesin, aqua, and glycerin) from Thor. The Phase F ingredient for Example 2 is as follows. The thickening agent was Sodium Chloride (sodium chloride) from Mistralni. The Phase G ingredients for Example 2 are as follows. The UV absorber was Covabsorb DS (diethylhexyl syringylidenemalonate, butyl methoxydibenzoylmethane, and ethylhexyl salicylate) from Adina Cosmetic Ingredients. The nonionic surfactant was PEG-40 Hydrogenated Castor Oil (PEG-40 hydrogenated castor oil) from New Directions UK. The fragrance was Fragrance VIVA LA GIOIA (parfum) from Givaudan. The acidic exfoliant was 30% Citric Acid Solution (aqua, citric acid) from GCD. EXAMPLE 1 A lemon scented exfoliator hair tonic was prepared as follows. The Phase A ingredients listed in Table 1 were combined in a main vessel and then homogenised to uniformity at 2000rpm to ensure the Cobiogum was fully dispersed with no lumps. The Phase B ingredients were then combined in a separate vessel and heated at 50°C until PEG-40 Hydrogenated Castor Oil had melted. The Phase B ingredients were added to the main vessel and homogenised at 3000-5000rpm to uniformity. The Phase C ingredients were added to the main vessel and homogenised at 3000-5000rpm to uniformity. The pH of the contents of the main vessel was adjusted to between 3.5 and 3.8 with Phase D. As an alternative, the Ph could be adjusted with citric acid. After 12 hours, the hair tonic was homogenises to ensure that the fluorescent dye was completely mixed in and to ensure the bulk was fully uniform. TABLE 1 Phase Amount (%w / w) Ingredient A 39.03 Diluent A 1.00 First moisturiser A 10.00 Anti-inflammatory agent A 10.00 First hydrosol A 10.00 Second hydrosol A 10.00 Acidic exfoliant A 5.00 Solvent A 5.00 Second moisturiser A 0.02 Fluorescent dye A 1.00 Thickening agent A 4.00 Pearling agent A 2.00 Third Moisturiser B 0.30 UV absorber B 0.80 Nonionic surfactant B 0.50 Preservative C 1.00 Preservative D 0.35 Buffering agent EXAMPLE 2 A colour change shampoo was prepared as follows. The Phase A ingredients listed in Table 2 were combined in a main vessel and then homogenised to uniformity using a large hole mixer head at 4000rpm. The Ph of the water phase was adjusted to 5.0 before the Ph-dependent dye was added. The Phase B ingredients were then added to the main vessel and homogenised to uniformity at 3000rpm. In an alternative embodiment, the phase A and B ingredients may be homogenised to uniformity at 3000rpm to 6000rpm, depending on batch size. The Phase C ingredients were added to the main vessel and homogenised at 3000rpm. In an alternative embodiment, the phase A, B and C ingredients may be homogenised to uniformity at 3000rpm to 6000rpm, depending on batch size. The Phase D ingredients were added to the main vessel and homogenised at 3000rpm. In an alternative embodiment, the phase A, B, C and D ingredients may be homogenised to uniformity at 3000rpm to 6000rpm, depending on batch size. The Phase E ingredients were added to the main vessel and homogenised at 3000rpm. In an alternative embodiment, the phase A, B, C, D, and E ingredients may be homogenised to uniformity at 3000rpm to 6000rpm, depending on batch size. The Phase F ingredients were added to the main vessel and homogenised at 3000rpm. In an alternative embodiment, the phase A, B, C, D, E, and F ingredients may be homogenised to uniformity at 3000rpm to 6000rpm, depending on batch size. A pre-mix of the phase G ingredients was prepared and then added to the main vessel and homogenised at 3000rpm. In an alternative embodiment, the phase A, B, C, D, E, F, and G ingredients may be homogenised to uniformity at 3000rpm to 6000rpm, depending on batch size. TABLE 2 Phase Amount (%w / w) Ingredient A 23.78 Diluent A 2.00 Conditioner A 2.00 Moisturiser A 0.20 Buffering agent A 30.00 Anthocyanin dye A 0.32 Acidic exfoliant B 25.00 First surfactant B 7.00 Second surfactant C 2.00 Conditioner D 3.00 Thickening agent E 1.00 Preservative F 1.00 Thickening agent G 0.50 UV absorber G 1.00 Nonionic surfactant G 1.00 Fragrance H 0.20 Acidic exfoliant Advantages of the acidic exfoliant (in particular citric acid and glycerin) include that it cleanses an oily scalp, removes dead skin cells, remove sebum which can clog hair follicles and prevent hair growth, and diminishes corneacyte cohesion. Advantages of lemon oil hydrosol include that it cleanses an oily scalp, removes dead skin cells, removes bacterial growth which can cause infections, removes sebum which can clog hair follicles and prevent hair growth, and removes bacteria, which can cause weakened follicles causing hair loss. Advantages of using an anti-inflammatory agent (Witch hazel) include that it provides gentle astringent properties to help control excess oil and tighten pores without overdrying the skin. Advantages of including a nonionic surfactant (hydrogenated castor oil) include that removes sebum which can clog hair follicles and prevent hair growth, and removes bacteria, which can cause weakened follicles causing hair loss.

Claims

1. A two-part composition for treating hair which composition comprises (a) a first composition comprising an acidic exfoliant; and (b) a second composition comprising a hair treatment agent and an anthocyanin dye; wherein the pH of composition (a) is lower than the pH of composition (b) such that the colour of the anthocyanin dye changes on contact with composition (a) wherein the two-part composition when mixed has a balanced acidic pH to help maintain the natural scalp environment; wherein the first composition comprises from 5 to 15% by weight of the acidic exfoliant.

2. The two-part composition as defined in claim 1 wherein the balanced acidic pH is from 3 to 6.

3. The two-part composition as defined in claim 1 or claim 2 wherein the acidic exfoliant is an organic acid.

4. The two-part composition as defined in claim 3 wherein the acidic exfoliant is an alpha hydroxy acid.

5. The two-part composition as defined in claim 3 or claim 4 wherein the acidic exfoliant is glycolic acid, lactic acid, malic acid, tartaric acid, hydroxycaprylic acid, hydroxycapric acid, salicylic acid, and / or citric acid.

6. The two-part composition as defined in any one of the preceding claims wherein the first composition comprises an anti-inflammatory agent.

7. The two-part composition as defined in any one of the preceding claims wherein the first composition comprises from 5 to 15% by weight of an anti-inflammatory agent.

8. The two-part composition as defined in any one of the preceding claims wherein the first composition comprises a hydrosol.

9. The two-part composition as defined in any one of the preceding claims wherein the first composition comprises from 10 to 30% by weight of a hydrosol.

10. The two-part composition as defined in any one of the preceding claims wherein the first composition comprises a moisturiser11. The two-part composition as defined in claim 10 wherein the first composition comprises from 3 to 15% by weight of a moisturiser.06 01 2612. The two-part composition as defined in any one of the preceding claims wherein the first and / or second composition comprise a diluent where the balance of the first and / or second composition comprises the diluent.

13. The two-part composition as defined in 12 wherein the diluent includes a solvent.

14. The two-part composition as defined in 13 wherein the solvent is an alkyl diol.

15. The two-part composition as defined in any one of the preceding claims wherein the first and / or second composition comprise one or more excipients which comprise one or more of a UV filter, a pearling agent, a preservative, a preservation-enhancing agent, an antifungal agent a buffer agent, a dye, and / or a thickening agent.

16. The two-part composition as defined in claim 15 wherein the first and / or second composition comprises from 3 to 15% by weight of the excipient.

17. The two-part composition as defined in any one of the preceding claims wherein the hair treatment agent comprises a conditioner and / or a surfactant.

18. The two-part composition as defined in claim 17 wherein the hair treatment agent comprises a conditioner which is a silicone-based conditioning shampoo and / or a hydrolysed protein based conditioning cleanser.

19. The two-part composition as defined in claim 17 or claim 18 wherein the second composition comprises from 1 to 20% by weight of the conditioner.

20. The two-part composition as defined in any one of claims 17 to 19 wherein the hair treatment agent comprises a surfactant which is a cleansing agent and / or a foaming agent.

21. The two-part composition as defined in any one of claims 17 to 20 wherein the second composition comprises from 10 to 50% by weight of the surfactant.

22. The two-part composition as defined in any one of the preceding claims wherein the anthocyanin dye is a plant dye and the second composition comprises from 10 to 50% by weight of the anthocyanin dye.

23. The two-part composition as defined in any one of the preceding claims wherein the first composition comprises:from 5 to 15% by weight of the acidic exfoliant;from 5 to 15% by weight of an anti-inflammatory agent;from 10 to 30% by weight of a hydrosol;06 01 26from 3 to 15% by weight of a moisturiser;from 3 to 15% by weight of an excipient; wherein the balance of the first composition is a diluent; wherein the hair treatment agent comprises a conditioner and / or a surfactant and / or wherein the second composition comprises:from 1 to 20% by weight of a conditioner;from 10 to 50% by weight of a surfactant;from 10 to 50% by weight of the anthocyanin dye;from 3 to 15% by weight of an excipient; wherein the balance of the second composition is a diluent.

24. A method of hair and / or scalp treatment wherein the method comprises the steps of:(i) applying a first composition comprising an acidic exfoliant to the hair and / or scalp; and(ii) applying a second composition comprising a hair treatment agent and an anthocyanin dye to the hair and / or scalp;wherein the pH of the first composition is lower than the pH of the second composition such that the colour of the anthocyanin dye changes on contact with the first composition; wherein the two-part composition when mixed has a balanced acidic pH to help maintain the natural scalp environment; and wherein the first composition comprises from 5 to 15% by weight of the acidic exfoliant.

25. The method of claim 24 wherein the first and / or second composition are as defined in any one of claims 1 to 23.