HLB values apply in cosmetics and skin care products
Hydrophilic-lipophilic balance
HLB
Surfactant
is composed of a water soluble functional group and a
lipophilic tail (oil loving).
William Griffin who worked in Atlas Power
Company, in the late 1940s, introduced the Hydrophilic-Lipophilic Balance
system (HLB) as a way of figuring out which emulsifier would work best
The proportion between the weight
percentages of these two groups in a surfactant molecule is an indication of
the behavior that may be expected from that product.
An emulsifier that is lipophilic in
character is assigned a low HLB number and an emulsifier that is hydrophilic in
character is assigned a high number. The midpoint is approximately ten and the
assigned values have ranged from one to forty.
HLBo=(WA x HLBA+ WB
x HLBB )/ (WA+ WB)
Where,
WA = the amount (weight) of the
1st emulsifier (A) used
WB = the amount (weight) of the
2nd emulsifier (B) used.
Above are the best ratios of emulsifier (A)
and emulsifier (B)
HLBA= the assigned HLB value for
emulsifier A
HLBB= the assigned HLB value for
emulsifier B
HLBo= the “required HLB” of the
oil for the type of emulsion being studied.
Ref. Ashish Gadhave, Determination of
hydrophilic-lipophilic balance value. Internal journal of science and research.
ISSN 23197064
Why do we need to understand the meaning of surfactant? Because it is one of the important rule in cosmetics and skin care products.
Why do we need to understand the meaning of surfactant? Because it is one of the important rule in cosmetics and skin care products.
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