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Mederma is a topical product used to improve scar appearance. It is a gel based on an onion extract. Mederma is product of HRA Pharma, a division of Perrigo.
A drying oil is an oil that hardens to a tough, solid film after a period of exposure to air, at room temperature. The oil hardens through a chemical reaction in which the components crosslink (and hence polymerize ) by the action of oxygen (not through the evaporation of water or other solvents ).
In 1925, stable napthenate driers were developed in Germany and commercialised in the US in the early 1930s, in parallel with the development of durable and fast-drying alkyd resin enamels. In the 1950s, metallo-organics based on synthetic acids were introduced as driers. [2] An early work on the drying oils and oil drying agents was by Andés ...
Radin, for her part, has narrowed her scar-minimizing routine to a mix of products—she’s still experimenting with application order—including Hero Rescue Balm, Mederma Scar Gel, Bio-Oil ...
A further byproduct called tall oil fatty acid (TOFA) is a cheap source of oleic acid. [219] Tamanu or foraha oil [220] from the Calophyllum tacamahaca, is important in Polynesian culture, and, although very expensive, [220] is used for skin care. [221] Tonka bean oil (Cumaru oil), popular ingredient in cologne, used medicinally in Brazil. [222]
Research shows the use of vitamin E and onion extract (sold as Mederma) as treatments for scars is ineffective. [52] Vitamin E causes contact dermatitis in up to 33% of users and in some cases it may worsen scar appearance and could cause minor skin irritations, [55] but Vitamin C and some of its esters fade the dark pigment associated with ...
Iodine value helps to classify oils according to the degree of unsaturation into drying oils, having IV > 150 (i.e. linseed, tung), semi-drying oils IV : 125 – 150 ( soybean, sunflower) and non-drying oils with IV < 125 (canola, olive, coconut). The IV ranges of several common oils and fats is provided by the table below.
Retarders are used to counter the fast drying properties of acrylic paints, making possible the usage of wet-on-wet or other techniques which would otherwise require oil paints. When used correctly, they can keep the paint wet from half an hour extra to a full day's working time.
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