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very small, there is a risk that smaller or larger fraction of the aerosol is circulated into the air with a risk of inhaling them and a probability of lung deposition. For hairdressers and other frequent users, this can be a potential health hazard. On the other hand, an increased understanding of personal care/cosmetic aerosol properties can be achieved by implementing the methodologies described above as tools in the product development process. Also, if employed in the spray nozzle development process, together with a correct choice of propellant, use of the above methodologies can provide ways to circumvent or minimize the risk of lung deposition for the user. From a manufacturer’s point of view, it opens up possibilities to gain more knowledge of the development process and its critical attributes. This knowledge can then be used as a marketing advantage against competitors lacking the same information. Conclusions Increased knowledge of the aerosol spray characteristics of personal care/cosmetic aerosol products can benefit the product development process and, hence, the final marketed product. Methodologies are available from other types of industry, such as analytical technologies used in the development of inhaled medicines. These methodologies have well defined and standardized approaches and documentation that can readily and easily be adopted by the personal care/cosmetic industry. It is the authors’ belief that the aerosol-based personal care/cosmetic industry can gain better knowledge of its products by adopting a more scientific approach to the aerosol properties and characterization. This can both increase consumer safety while providing a marketing advantage tool. Spray September 2016 Spray 43 Figure 7:


Spray September 2016
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