{"id":13031,"date":"2022-04-06T06:05:03","date_gmt":"2022-04-06T12:05:03","guid":{"rendered":"https:\/\/www.ulprospector.com\/knowledge\/?p=13031"},"modified":"2022-05-04T09:11:10","modified_gmt":"2022-05-04T15:11:10","slug":"pcc-instant-skin-tighteners","status":"publish","type":"post","link":"https:\/\/ulprospector.ul.com\/13031\/pcc-instant-skin-tighteners\/","title":{"rendered":"Instant Skin Tighteners"},"content":{"rendered":"

\"PersonVery few skincare products excite consumers or provide the immediately noticeable skin appearance benefits of instant skin tighteners. Within minutes they can dramatically improve the appearance of bags under the eyes and facial wrinkles. The effect is most noticeable around the crow\u2019s feet area and under-eye bags since the skin is thinner and more responsive to tightening ingredients. These products work best on women whose faces show little emotion or movement, which helps prevent the film from cracking and turning white on skin.<\/p>\n

Skin tightening products are not new but were first commercialized by Laboratoires S\u00e9rofart in the 1930s by Dr. Jacques C. Risler. The product, Serofart, used albumin extracted from horse serum blood as an active to tighten skin. The product was, however, discontinued in 1939 due to difficulties preserving the product. In the 50s and 60s, numerous other serum albumen-based products were introduced, such as Helena Rubinstein Skin Serum, Helene Curtis Magic Secret, Coty\u2019s Line Away, Hazel Bishop\u2019s Sudden Change, Studio Girl\u2019s Soft-Focus Temporary Wrinkle Remover, Max Factor\u2019s Touch of Youth Wrinkle Smoothing Lotion, Lilly Dach\u00e9\u2019s Instant Change, and Revlon Wonderlift Wrinkle Remover. All of these wrinkle smoothers were based on bovine serum albumin, a protein extracted from the blood of cattle (1). In the 70s and 80s, new types of instant skin tighteners emerged based on using 2-6%\u00a0 sodium silicate or sodium metasilicate as an active. These products all had a high pH of ~11, which can cause skin irritation and whitening due to the brittle nature of the film. However, the skin has a high buffering capacity which can rapidly normalize skin pH, which may help reduce some of the irritation potential. Soap bars, for example, have a pH of 9-10 and are not very irritating in the absence of hard water. Widely used sodium stearate<\/a>-based deodorants are leave-on products applied to sensitive, shaved underarm skin, and they are well tolerated in spite of having a pH of ~9. Modern sodium silicate-based tighteners use polyols<\/a> to help plasticize the film and clays to help provide a matt soft-focus effect to the film. Additional film formers<\/a> are also used in some formulations.<\/p>\n

Types of skin tightening formulations<\/h3>\n