Thames & Kosmos Creative Cosmetics Lab handleiding

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Handleiding

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An acid is a substance that releases hydrogen ions (H

) when dissolved in

water. While bases are chemicals that release hydroxide ions (OH

–

) when

dissolved in water. You encounter many acids and bases every day. The

vinegar and lemon juice you use to flavor food, the hydrochloric acid in your

stomach used to digest food, and the sulfuric acid in car batteries are all acids.

While baking soda, ammonia, and many household detergents are bases.

CH₃COOH +

CH₃CO2H₂O H₃O

Nature has really taken good

care of us. Our numerous fat

and sweat glands produce

a protective water-fat film

that keeps our skin and hair

flexible, and works as a water

repellent. Because of this film,

water simply runs off your skin

in the shower instead of sticking

to you or being absorbed. This

film is called the acid mantle,

because it is mildly acidic — its

pH-value varies from 4 to 6.

The acidity of your skin protects you

like armor against bacteria, viruses,

and mold, which are paralyzed by

acidic environments. By washing too

frequently and using an unsuitable

body cleanser, you can damage this

protective acidic coat. This is why it is

very important to treat the skin with

care and use the right cleansers.

Using pH Strips

Acids and Bases

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