Depaltors Flashcards
Is a term applied to any preparation (powder, liquid, cream or paste) designed for the removal of unnecessary hair (in particular, hair occurring on the face, legs and axilla) without causing injury to the skin.
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It is distinct from epilatory or hair destruction by hair pull out using tweezers, waxy and adhesives or electrolysis.
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Mechanism of action
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Depilatory preparations usually contain a strongly …..
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These cause degradation of hair keratin and deterioration of hair fibers because of the ……
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The pH of chemical depilatories usually falls between 10 and 12.5
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The jelly-like mass produced can be easily removed by ……
L
As the epidermis is also rich in keratin, the skin
may become irritated and sensitive if …..-
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….. are used primarily for the
arms and legs
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They should not be used on the face unless specifically listed for that purpose on the product’s label.
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Requirements for ideal depilatory product:
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Nontoxic
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nonirritant
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Remove hair rapidly, preferably in 4-6 min.
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Preferably odourless
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Stable on storage
L
Harmless to clothing
L
Exhibit cosmetic elegance
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Depilatory active reagents
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Sulfides
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Sodium sulfide
;
Strontium sulfide
L
too drastic in action (2% aqueous solution have a pH 12)
O
It will disintegrate hair within 6-7 min but it will simultaneously damage the stratum corneum.
K
Their depilatory action is linked to their….
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sulfhydrates
L
sodium hydroxide.
K
is a much milder one but must be used at a higher concentration than sodium sulfide.
O
Sulfide products are unpopular because they…
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The odour is most intense when the product is …….
L
➢It is advisable, therefore to remove the bulk of the product with a spatula before washing.
0
O
Substituted mercaptanes (thioglycolates)
L
The majority of depilatory available today belong to this group
O
calcium thioglycolate.
O