Elaboration and characterization of dental plasters obtained from a Moroccan gypsum

Kanouni, Mouhcine; Aazzab, Bouchaib; Tricha, Latifa; Samdi, A.; Moussa, R.; Hamel, J.; Gomina, Moussa

doi:10.1051/jp4:2005123044

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Óbidos gypsum fulfils the requirements for almost all properties relevant to dermocosmetics, being the only sample that may be considered to be adequate for dermocosmetic applications (Olejnik, 1999; Baltar et al , 2005; Aguzzi et al , 2007; López-Galindo et al , 2007; Viseras et al , 2007; Rowe et al , 2009; Thomas & Puleo, 2009; Karakaya et al , 2010), particularly for dental applications (Olejnik, 1999; El Kanouni et al , 2005). In contrast, the Soure and Loulé gypsums should be submitted to finer milling and reassessed.…”

Section: Discussionmentioning

confidence: 99%

“…A comparative study was focused on three of the main Portuguese gypsum deposits in Loulé, Óbidos and Soure, through examination of chemical, mineralogical, physical and technological properties, with particular emphasis on those recommended for assessment of the degree of quality needed for dermocosmetic formulations ( i.e. Olejnik, 1999; Kanouni et al , 2005; Aguzzi et al , 2007; López-Galindo et al , 2007; Viseras et al , 2007; El Karakaya et al , 2017). For dermocosmetic applications, gypsum should be alkaline (pH ≈ 10), fine grained (>90% fine fraction) and containing a small amount of potentially hazardous elements such as As, Fe, Cl, F, Cr, Cd and Pb.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Characterization of Portuguese gypsums as raw materials for dermocosmetics

et al. 2019

View full text Add to dashboard Cite

Portuguese gypsum deposits utilized by the cement industry were characterized mineralogically, chemically and technologically for possible application in dermocosmetics. The deposits studied (Loulé, Óbidos and Soure) correspond to small outcrops in diapiric anticline areas. In principle, they represent gypsites which are white, and generally of higher quality for traditional applications (e.g. white cement), or greyish, and generally not adequate for cements and mortars. The analytical methods used to characterize the materials were wet sieving and X-ray sedimentation, X-ray diffraction, X-ray fluorescence spectrometry and assessment of abrasiveness, plasticity, texturometrics (adhesivity and firmness), oil absorption and cooling rate. The Óbidos gypsum displayed greater mineralogical and chemical quality (almost pure calcium sulfate) and had a finer grain size (<63 μm), whereas Loulé and Soure gypsums contain mineralogical impurities (mainly quartz). The Óbidos gypsum shows good characteristics in general for application in dermocosmetics because of its absorption, plasticity, adhesivity, firmness and low abrasiveness.

show abstract