Medical Hydrology and Balneology: Environmental Aspects

Medical Hydrology and Balneology: Environmental Aspects
texture and soaps hardness were evaluated using a texturometer Stable Micro Systems
TA-XT2i (U.K.). The rheological behaviour of gels was performed at 20ºC,
using a rotational viscometer Brookfield DV-E (Germany), with the spindle number
6.
Results
Preparations EP 63, EP 125, and EP250 showed lower firmness and adhesiveness
than the respective Base (gel without pumice). After 30 days of storage, a
slight decrease of firmness was observed for all the formulations. With regard to
adhesiveness, only EP 125 presented a significant decrease after 30 days. All the
gels presented reofluidificant behaviour without thixotropy. For all the formulations,
there was a stabilization of the apparent viscosity after 15 days of preparation.
The SP 125 showed a hardness value of 7.15 N and a pH of 10.25. The pH of gels
EP250, EP125, and EP63 was respectively 7.69, 7.38 and 7.70.
Conclusions
In general, the developed gel formulations showed better characteristics for skin
application than soaps, and showed also good stability over time.
References
1. Cosmetic ingredients. Dermaxime Bio-Cellular skin products; [03-12-2011];
Available from: http:// http://www.dermaxime.com/pumice.ht.
2. Michalun N, Michalun MV. Milady's Skin Care and Cosmetic Ingredients Dictionary.
3th ed. Clifton Park: Cengage Learning; 2010.
3. Almeida IF, Bahia MF. Evaluation of the physical stability of two oleogels.
International Journal of Pharmaceutics. 2006;327(1-2):73-7.
Keywords: Pumice, Gel, Soap, Texture analysis, Rheology
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Balnea
2012, núm. 6, 255-256