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![Page 1: Hibiscus and cornflower – raw materials for natural hair dyeing Katarzyna Pytkowska Academy of Cosmetics and Health Care, Warsaw, Poland.](https://reader033.fdocuments.in/reader033/viewer/2022061306/5514935a550346b0158b616b/html5/thumbnails/1.jpg)
Hibiscus and cornflower – raw materials for natural
hair dyeing
Katarzyna PytkowskaAcademy of Cosmetics and Health Care, Warsaw, Poland
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Academy of Cosmetics and Health Care
Plant preparations for hair dyeing Plants have been used for dyeing hair for
ages Henna (Lawsonia inermis)
• lawsone, 2-hydroxy-1,4-naphthoquinone Green shells of walnut (Juglans regia)
• juglone, 5-hydroxy-1,4-naphthoquinone German chamomille (Chamomilla recutita)
• Apigenin Indigofera tinctoria
• Indigotin
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Academy of Cosmetics and Health Care
Other plants of interest Other plants used traditionally for hair
coloration in Europe Sweet sedge (Acorus calamus) Rhubarb (Rheum spp.) Oak bark
Plants containing high amount of dyes and pigments of intense shade Hibiscus (Hibiscus sabdariffa) Cornflower (Centaurea cyanus)
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Academy of Cosmetics and Health Care
Mechanisms of action of plant dyes Reactive dyeing
Maillard reaction with keratin • lawsone, juglone
Direct dyeing Adsorption of dyes/pigments on the hair
cuticle• Apigenin• Other flavonoids• Other substances
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Academy of Cosmetics and Health Care
Hibiscus sabdariffa petals The main
ingredient of hibiscus infusions
the additive to other blends of herbs Strong ruby-red
colour and characteristic aroma
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Academy of Cosmetics and Health Care
Colouring agents in hibiscus flavonoids
anthocyanides, flavonols
• E.g. delphinidin (1), delphinin, cyanidin (2), hibiscetin, gossipetin and their glycosides.
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Academy of Cosmetics and Health Care
Problems with natural dyes Natural dyes are (in solutions):
not very stable, prone to oxidation, browning, UV discolouration etc. highly pH sensitive
none of these adverse effects are applicable to the dry powdered material containing natural dye
but … in-home application of packs and pastes prepared from
dry herbal material could be difficult Colour effects are sometimes dificult to predict Colour is strongly determined by the plant
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Academy of Cosmetics and Health Care
Factors influencing intensity and durability of color the kind of hair and the damage intensity, initial hair colour, earlier application of synthetic dyes
and/or bleaching products, structure of a natural dye, frequency of the application of plant
preparation, the temperature of dyeing mixture duration of the mixture - hair contact
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Academy of Cosmetics and Health Care
How to change colour coming from natural dyes? … by complexes formation or
destabilization Mordants Chelating agents
… by dye absorption HMW additives to formulation
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Our research
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Academy of Cosmetics and Health Care
Hibiscus We used the following types of
preparations for research dyeing blend
• Infusion of H. sabdariffa petals in water in proportion 1: 10, applied cold,
dyeing rinse• Infusion of H. sabdariffa petals in water in proportion
1: 20, applied warm, dyeing pastes
• thickened preparations based on the dyeing blend The colour of the dyeing preparation
strongly depends on pH
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Academy of Cosmetics and Health Care
pH value Colour ot the dyeing blend
3,12 Intense pink-red
3,35 Pink-red
4,80 Light pink
5,58 No colour
6,57 Light yellow
7,09 Brown-yellow
7,65 Light blue
7,90 Brown-blue
> 7,90 Brown-blue
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Academy of Cosmetics and Health Care
Rinse
Colour effect 2x 2 min. 4x 2min.
Dark brown - -
Medium brown +++ +++
Golden reflexes ++ +++
Red shade - -
Conditioning ++ ++
+++ dominant colour, ++ additional shades, - none Shade: +++ strong shade, ++ visible shade, + light shade, - no shade
Conditioning effect: +++ strong, ++ good, + slight, - none
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Academy of Cosmetics and Health Care
Paste with kaolin 20 min.
Paste with kaolin40 min.
Paste with wheat bran20 min.
Paste with wheat bran40 min.
Dark brown +++ +++ ++ +++
Medium brown ++ - +++ ++
Golden reflexes
+ - ++ +++
Red shades - + - -
Conditioning effect
+ - ++ +++
+++ dominant colour, ++ additional shades, - none Shade: +++ strong shade, ++ visible shade, + light shade, - no shade
Conditioning effect: +++ strong, ++ good, + slight, - none
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Academy of Cosmetics and Health Care
Hibiscus Effects
Slight colour effect on dark hair Strong conditioning Adsorbents change the colour effect
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Preparations for grey or bleached hair
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Academy of Cosmetics and Health Care
Grey or bleached hair Problem – too yellow shade
Remain of phaeomelanin in originally blonde, grey hair
Insufficuent bleaching Solution – optical brightening
Sorption of blue dye/pigment on the hair surface – use of blue pigment-rich raw material
Removal of red/yellow dyes from a natural raw material by sorption or complex formation
pH shift of colour (not applicable to human hair)
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Hibiscus preparations
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Academy of Cosmetics and Health Care
Additive pH valueColour
uniformity
Hair shade
pink blonde
No additive 3,17 + + + + + + -
Rice mash 3,25 +/ - + + +
Kaolin 3,25 - + +
Corn flour 3,31 - + +
Wheat bran 3,36 + + + - + + +
Oat bran 3,38 + + + - + + +
Colour uniformity +++ uniform, even colour; +/- quite even colour ; - uneven, not uniform colour
Colour+++ dominant shade; ++ additional shade; + very light shade;
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Effects of inorganic additives
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Academy of Cosmetics and Health Care
Mordants used in traditional textile dyeing Alum (potassium aluminum sulfate)
does not affect colour strongly. It is usually used with potassium tartrate, which helps to provide evenness and will also brighten slightly.
Iron (ferrous sulfate). It will sadden or darken colours,
Tin (stannous chloride) blooms or brightens colours, especially reds, oranges
and yellows. Almost always used with potassium tartrate. Not allowed for use in cosmetics
Copper (copper sulfate) saddens colours and brings out greens.
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Academy of Cosmetics and Health Care
Chromametric analysis L*a*b* scale
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Academy of Cosmetics and Health Care
Natural blond hair dL*(D65)da*(D65
)db*(D65
)dE*ab(D65
)
Hibiscus sabdariffa, pH=3,3
-5,22 -1,99 -4,32 7,06
Hibiscus sabdariffa + Fe2O3; pH=3,3 -3,29 -2,02 -7,45 8,39
Hibiscus sabdariffa, pH=5,8
-3,11 1,41 -2,63 4,31
Hibiscus sabdariffa + Fe2O3; pH=5,8 -8,82 -2,34 -4,58 10,21
Hibiscus sabdariffa + Fe2O3 + trisodium EDTA -9,07 3,77 -4,59 10,84
Hibiscus sabdariffa + trisodium EDTA
-9,72 5,99 -6,48 13,13
(Chromametr Konica-Minolta: Chroma Meter CR-400)
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Academy of Cosmetics and Health Care
Bleached hairdL*(D65)
da*(D65)
db*(D65)
dE*ab(D65)
Hibiscus sabdariffa, pH=3,3 -6,19 2,42 -6,44 9,25
Hibiscus sabdariffa + Fe2O3; pH=3,3 -12,33 -3,18 -13,15 18,3
Hibiscus sabdariffa, pH=5,8 -7,97 -4,79 -10,55 14,06
Hibiscus sabdariffa + Fe2O3; pH=5,8 -7,06 -4,63 -5,11 9,86
Hibiscus sabdariffa + Fe2O3 + trisodium EDTA
-9,99 7,71 -14,43 19,17
Hibiscus sabdariffa + trisodium EDTA
-9,67 5,72 -12,42 16,74
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Cornflower preparations
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Academy of Cosmetics and Health Care
Cornflower The main blue
pigment of cornflower petals is a complex compound of flavonoids and Al ion (protocyanin)
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Academy of Cosmetics and Health Care
Cornflower preparations We used the following types of
preparations for research dyeing blend
• Infusion of cornflower petals in water, applied cold, dyeing rinse
• Infusion of cornflower petals in hot water• The infusion changed the colour to strawberry-red
The problem The stability of Al-flavonoid complex
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Academy of Cosmetics and Health Care
Cornflower Application on bleached hair
Decrease of b* parameter in chromametric evaluation
Colour shift by mordants Cu and Zn containing mordants shifted
the cornflower-based colour to the blue region
The effect was similar to the effect of pure mordants
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Academy of Cosmetics and Health Care
Conclusions Hibiscus-based raw materials should
be fully applicable to hair care cosmetics for grey and
bleached hair plant-based dyeing preparations
Cornflower is a plant of high interest The main problem to solve is blue
pigment stability in solutions
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Academy of Cosmetics and Health Care
Acknowledgments I would like to thank the researchers
involved in the project: Stanislaw Krus MSc, Halah Faraj BSc, Sylwia Antczak BSc and Ewa Pawłowska.