We worked through a few examples finding the equivalent resistance for combination circuits. Then, we did one example finding the current in and potential difference across one resistor in a combination circuit.

The original main use of lip gloss will be discussed, to treat dull and chapped lips along with cracking and peeling. The main ingredients of petrolatum, oils, polybutene, color additives, fragrance, vitamins, and preservatives were each examined for their chemistry and use in the product. The oils most commonly used, such as olive oil, coconut oil and cocoa butter were discussed as moisturizers. The use of foundations to create even skin tone and cover flaws, to improve coverage and increase cosmetic skin life was discussed. The different bases which are used were listed and each will be discussed in the next class.

Starting with a brief discussion of some of the uses for lipstick, we then began a discussion of the ingredients which are found in lipstick. The chemistry of beeswax was discussed, composed of fatty acids and long chain alcohols. The structure of long chain alcohols was sketched and explained, as well as fatty acids. The melting point and use as a barrier was discussed, and the superiority to petroleum jelly noted. Oils were discussed for their use in lipstick as a moisturizer, specifically castor oil. Its chemical make-up was also discussed as a lipid. Iron oxides used as a pigment, its formula, and titanium dioxides used as a thickener and sunscreen was listed.The different preservatives which can be found In lipsticks, such as propylparaben was mentioned as a estrogen mimic.

The cosmetic uses for primers to reduce pore size, prolong makeup use, and allow for smooth application of makeup was first discussed. The chemicals used in primers and their primary incorporation were listed. These included titanium dioxide, salicylic acid, vitamins A,C.,and E along with their use as moisturizers, oil absorbing and fragrance.

Sam was going to skype this lesson. I had a series of about 20 common cosmetic ingredients to discuss, their uses in and possible problems with their use. Including, but not limited to Agar,
Alcohols, Parabens, Aluminum chlorhydrate, cellulose, tocopherols, gums and emulsifiers

We were able to do a little review since it has been a while.

Sam was absent and I worked on lesson plans.

Vlad was not feeling well, so we didn't Skype.

Using the lesson plan left by her teacher, I assisted Samantha with her Physics project on Cosmetology. She began with the research needed to write the paper.

See Thursday lesson outline