6 Formulating moisturising products EmollientsAn emollient is a material which, when applied to the skin makes it feel soft and smooth.HumectantsThese exhibit hygroscopic behaviour, they can draw in and hold onto large amounts of water.
7 What makes a good moisturiser? You need to understand the skin type you are formulating for.You need to understand target areaIt should feel nice on application, not too greasy.It shouldn’t ‘soap up’It should smell nice, or have no base odour
15 Suncare products How does sunlight affect the skin? Tanning through darkening of melanin precursorsSkin damage – sunburn, premature ageing, skin cancerFree radicals
16 UVA & UVB light UVB – (290-320nm) UVA – (320-400nm) Responsible for long term damageCan penetrate glassUVB – ( nm)Causes sunburn (erythema)
17 SunscreensA Sunscreen is the UV light absorbing agent that helps to lower the incidence of dermal malignancies. The function of the sunscreen is the protection of the skin from damaging UV light.Physical sunscreensChemical Sunscreens
18 SPF calculations and star rating SPF = Time to produce erythema in protected skinTime to produce erythema in unprotected skinStar Rating = mean UVA/UVB ratio0 to <0.2 too low to make UVA claim
23 Depilatories Thyoglycollate Enyzme based Work by breaking the disulphide linkages in the keratin hair fibres, and totally disintegrate the hairEnyzme basedThese contain protein-digesting enzymes (papain is a good example. Treat the empty hair follicle to reduce hair growth over a number of months