Students are expected to
http://www.youtube.com/watch?v=mYt0v0v19eM (an example of a large scale enterprise)
http://www.youtube.com/watch?v=PvaeTb38TJc (an example of a small factory)
http://www.youtube.com/watch?v=bj0XooeMFcs (an example of a home-made production)
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After presenting given video excerpts, group discussion is carried out where students are asked to think about reasons why one would want to make cosmetics while supermarkets are full of all imaginable cosmetic products. In addition, students are asked to think about the possible benefits and risks of (a) industrial, (b) home-made cosmetic products.
We propose 7 possible reasons that can be used to help guide the students if needed:
We would be able to choose the odour we like or have no odour at all. Still, since compounds from the nature have their natural odour then a cream with no specific flavouring could still have an odour.
Commercial products often do not include enough of the beneficial substances that have an effect on the skin. Rather the additives written on the package have a psychological effect, e.g. “ Vitamine E helps reduce the signs of ageing on the skin“.
There is no need to add substances that add odour, colour or increase preservation time. The cream does not have to be kept on the shop shelves for months; it can be mixed together and be used straight away.
It is often said that the best gift is one that is made by yourself. Adding a bit of heart to it makes the gift better than any other, often a more expensive gift.
People who choose to make their own cosmetics, however, should be aware that whatever recipes they dream up at home will most likely not resemble the highly processed and largely synthetic products that they are used to buying in stores. Additionally, people who venture to make homemade cosmetics should take into consideration the effects that natural products might have on the skin and always be careful not to let products expire or spoil.
Commercial products often contain significant amounts of synthetic ingredients that can be irritating or damaging to skin. The positive side is that these synthetics, as well as the ample preservatives in commercial cosmetics, extend the shelf lives of these products and prevent them from spoiling or harboring bacteria. Homemade cosmetics, although they are free of synthetics such as parabens, are much more quick to go rancid. As a result, homemade cosmetics can be made only in very small batches, and they need to be stored properly and used quickly to prevent contamination. Failing to do so can cause spoiling or the growth of bacteria that can cause infections.