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South Africa
South Africa (ZA)
English
* Via distributor
Hong Kong
KPSS Hong Kong Ltd.
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Mainland China
Shanghai Si Rui Professional Haircare Co. Ltd, China *.
中文（简体）
Singapore
Kao Singapore Pte. Ltd.
Taiwan
KPSS Taiwan Ltd.
Austria
Kao Austria HandelsgesellschaftmbH
Deutsch
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Dobra Priča Doo, Balkan *
Српски
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Kao Belgium N.V.
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Czech
Goldwell Cosmetics (CZ) s.r.o.
Čeština
Denmark
Kao Denmark A/S
Finland
Kao Finland Oy
Suomi
France
Lilac Breasted Roller SAS, France *
Français
Germany
Kao Germany GmbH
German
Greece
Hair Care Ltd, Greece *
ελληνικά
Italy
Kao Italy S.p.A.
Italiano
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Kao Netherlands B.V.
Dutch
Norway
Kao Norway AS
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JBS Beauty sp. z o.o. sp.k., Poland *
Polski
Spain
Bella Aurora Labs SA, Spain *
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Sweden
Kao Sweden AB
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Kao Switzerland AG
United Kingdom
KPSS (UK) Limited
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Kao Canada Inc.
USA
Kao USA Inc.
Australia
Kao Australia Pty. Limited
New Zealand
Kao New Zealand Limited
International
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The Cortex, the inner middle layer, is the most important and complex part of the hair. Because it contains protein chains, hydrogen bonds, salt bonds and disulfide bonds, it is relevant for chemical services like coloring, perming, straightening or keratin treatments. Because of its inner structure, the Cortex is responsible for strength and flexibility. It also contains the pigments (melanin) that determine natural hair color.
A cortex cell contains Macrofibrils.
Each Macrofibril consists of Microfibrils.
Microfibril (Intermediar Filaments) consists of Protofibrils, each made of Protofilaments. Each Protofilament is made of Alpha-Helices.
In the innermost the hair is made of disulfide, ionic and hydrogen bonds, that forms the Alpha-Helix.