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The preparation of stable nature BB creams and determination of its properties
Marčanová, Milada ; Sovová, Šárka (referee) ; Hurčíková, Andrea (advisor)
The aim of this diploma thesis was create a natural BB cream that, in addition to sufficient hydration, would protect the skin from sunlight, unify its colour tone and at the same time sufficiently cover any imperfections. After proposition a suitable recipe, it was necessary to determine the stability of the prepared BB creams. The stability was evaluated by comparing the results from the dispersion analyser LUMiSizer at various temperatures and current load tests in an oven. The pseudoplastic properties were confirmed by the rheology characterization of the flow properties, which makes the BB cream a continuous layer on the skin after it is spread. In order to protect against sunlight, it was necessary to determine the SPF and measure the colour shades of the prepared BB creams for comparison with commercially available preparations.
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Influence of stirring time on cosmetic stability
Grujić, Ksenija ; Sovová, Šárka (referee) ; Hurčíková, Andrea (advisor)
This bachelor thesis is based on the study of the influence of mixing time and revolutions per minute on the preparation of BB creams. The literature review of the thesis is based on the acquired information about the topic. The basic concepts and problems concerning dispersion systems, emulsions, mixing methods and cosmetics are described in this part of the thesis. The first segment of the experimental part is based on the preparation of BB creams themselves. The influence of agitation time and speed on the stability of prepared samples was tested. The stability of the samples was tested on LUMiSizer. The data were compared and processed.
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The preparation of stable nature BB creams and determination of its properties
Marčanová, Milada ; Sovová, Šárka (referee) ; Hurčíková, Andrea (advisor)
The aim of this diploma thesis was create a natural BB cream that, in addition to sufficient hydration, would protect the skin from sunlight, unify its colour tone and at the same time sufficiently cover any imperfections. After proposition a suitable recipe, it was necessary to determine the stability of the prepared BB creams. The stability was evaluated by comparing the results from the dispersion analyser LUMiSizer at various temperatures and current load tests in an oven. The pseudoplastic properties were confirmed by the rheology characterization of the flow properties, which makes the BB cream a continuous layer on the skin after it is spread. In order to protect against sunlight, it was necessary to determine the SPF and measure the colour shades of the prepared BB creams for comparison with commercially available preparations.
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|
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Influence of stirring time on cosmetic stability
Grujić, Ksenija ; Sovová, Šárka (referee) ; Hurčíková, Andrea (advisor)
This bachelor thesis is based on the study of the influence of mixing time and revolutions per minute on the preparation of BB creams. The literature review of the thesis is based on the acquired information about the topic. The basic concepts and problems concerning dispersion systems, emulsions, mixing methods and cosmetics are described in this part of the thesis. The first segment of the experimental part is based on the preparation of BB creams themselves. The influence of agitation time and speed on the stability of prepared samples was tested. The stability of the samples was tested on LUMiSizer. The data were compared and processed.
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