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Silica microspheres : safe alternative to talc / Michael Sweeney in GLOBAL PERSONAL CARE, Vol. 25, N° 1 (01/2024)
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Titre : Silica microspheres : safe alternative to talc Type de document : texte imprimé Auteurs : Michael Sweeney, Auteur Année de publication : 2024 Article en page(s) : p. 26-28 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Formulation (Génie chimique)
Ingrédients cosmétiques
Maquillage
Microsphères
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Talc -- Produits de remplacementIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Once a popular ingredient in cosmetics, talcums and baby powders, talc has come under question for its potential toxicity. Talc is a soft, smooth and natural mineral that is crushed and refined into a fine powder for use in cosmetic formulations.
Having similar properties to silica but much cheaper in cost, talc is a main ingredient in liquid and powder makeup such as blush, eyeliner, eye shadow and foundation. It provides lubrication and improves product texture and feel.
When mined from the earth, talc deposits often are located in close proximity to asbestos, a cancer-causing agent. Therefore, digging for talc too deep or near an overlapping asbestos deposit will capture this contaminant. As a result, mined talc can contain asbestos, creating a risk for cancer.Note de contenu : - Talc powder and ovarian cancer
- Beauty brands moving away from talc
- Safer than talc
- Superior characteristics for better cosmetics
- Different grades for specific formulations
- Formulations without talc
- Range of cosmetic and skincare applicatiçons
- Table 1 : Fine silica microspheres display a range of characteristics to meet specific formulation needs
- Table 2 : Test formulations demonstrate the replacement of talc with fine silica microspheres alone and combined with starch
- Table 3 : Fine silica microspheres boost performance objectives in many types of cosmetics and skin care formulationsEn ligne : https://drive.google.com/file/d/1nuL8U93r-bVHnw2TkAvdN4s5vMKyqvPo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40628
in GLOBAL PERSONAL CARE > Vol. 25, N° 1 (01/2024) . - p. 26-28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24397 - Périodique Bibliothèque principale Documentaires Disponible Using spherical silica gels to improve sunscreen / Michael Sweeney in GLOBAL PERSONAL CARE, Vol. 23, N° 9 (10/2022)
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Titre : Using spherical silica gels to improve sunscreen Type de document : texte imprimé Auteurs : Michael Sweeney, Auteur Année de publication : 2022 Article en page(s) : p. 54-56 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques
Dermo-cosmétologie
Emulsions -- Emploi en cosmétologie
Formulation (Génie chimique)
Gel de silice
Peau -- Soins et hygiène
Produits antisolairesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : AGC Chemicals Americas explains how recent advances in silica gel technology mean W/O (water-in-oil) sun care formulations can now be created that rival the appeal and processing ease of O/W (oil-in-water) formulations.
Skincare product formulators often turn to water-in-oil (W/O) emulsions when working with inorganic sunscreen actives because of their superior sun protection factor (SPF) efficiency per unit of active. Oil-in-water (O/W) formulations have tactile aesthetic advantages but are less SPF-efficient and present formulation issues with inorganic sunscreen actives, especially zinc oxide.
W/O formulations provide better SPF efficiency in part because of the more consistent film they apply to the hydrophobic skin surface. There are other advantages as well, including the fact W/O emulsions have a degree of inherent water resistance not seen in O/W emulsions that contain hydrophilic emulsifiers.Note de contenu : - Challenges of W/O formulations using mineral actives
- Challenges of safe UV protection for daily wear applications
- SPF booster options
- Advantages of silica gels
- Nonporous aqueous gels provide additional SPF boost
- Processing advantages of silica gels
- Test formulations demonstrate results
- Fig. 1 : As UV light passes through the film of the sunscreen product on the skin, the porosity of the silica gels increases the pathlengthand causes it to scatter, promoting UV light reflection from the skin
- Fig. 2 : Silica gels are harder than plastic microbeads, so they retain their spherical shape and roll on easier, improving spreadibility on the skin
- Table 1 : Test formulations demonstrate in vitro SPF increase after adding porour and nonporous silica gelsEn ligne : https://drive.google.com/file/d/1SIWJP-W6poZZoRFET4PIHunPaNWXFbhZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38664
in GLOBAL PERSONAL CARE > Vol. 23, N° 9 (10/2022) . - p. 54-56[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23619 - Périodique Bibliothèque principale Documentaires Disponible