Select your location:
South Africa
South Africa (ZA)
English
* Via distributor
Hong Kong
KPSS Hong Kong Ltd.
繁體中文
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
Balkan
Dobra Priča Doo, Balkan *
Српски
Belgium
Kao Belgium N.V.
Deutch
French
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
Netherlands
Kao Netherlands B.V.
Dutch
Norway
Kao Norway AS
Poland
JBS Beauty sp. z o.o. sp.k., Poland *
Polski
Spain
Bella Aurora Labs SA, Spain *
Español
Sweden
Kao Sweden AB
Switzerland
Kao Switzerland AG
United Kingdom
KPSS (UK) Limited
Canada
Kao Canada Inc.
USA
Kao USA Inc.
Australia
Kao Australia Pty. Limited
New Zealand
Kao New Zealand Limited
International
Salon Finder
Diventa partner
Contact Us
The definition of porosity is the ability of hair to absorb moisture, which is mainly due to how swollen or tight the cuticle layer is against the hair shaft.
Low porosity means low absorption of moisture
High porosity means high absorption of moisture
Understanding porosity is important to comprehending what effect various products have on the hair shaft. Coloring and chemical services, shampoos and treatments all have a different effect on healthy vs. damaged hair.
Porous hair absorbs product more rapidly and can release it more quickly – causing color to fade. Healthy hair absorbs the proper amount of product.
Hair becomes porous, dry or brittle because to the loss of natural lipids. Very porous hair, where the cuticle is wide open, is usually damaged from over-processing due to too much bleach, over-coloring, and straighteners or due to the over-use of heat from flat irons or blow dryers.
Overly porous hair tends to be damaged. Having the cuticle wide open is like an escape hatch for hair color. Even the best color line can fade more quickly due to unhealthy hair. Damaged hair looks dull and lifeless, and breaks easily.
External elements like blow dryers, flat irons, the sun, and even rough handling of delicate hair when it’s damp can also cause damage. Extreme damage can result in the cortex rupturing.
Learn more about Hair Facts here.