Thank you

Thank you to Ros for installing this weblog for us to use for your assignment.

Invitation for blog

Dear Students of MOT 3204 I Chem 2010,

Here is the blog for you to record your blog on:

1. Making Soap from Waste Cooking Oil &

2. Testing the Soap made

Regards

Dr Irene

Yas & Roz

Emulsification and Moisturizing Effect

Emulsification.

In this test, we need to observe if the soap formed layers or not. If the soap formed two layers for example at the bottom of the soap has darker colour than the top parts, then the soap did not emulsified completely.

1) Yas's and Ros's Soaps.

-Soap 1-(soap is inverted)

From the picture above, you can see that the soap formed two layers. The lower part of the soap appeared darker in colour compared to the upper part.

-Soap 2-

In this soap 2, two layers formed but less compared to the first soap. Meaning, this soap emulsified better than the first soap.

-Soap 3-

From this sample, what can u say about the completeness of the emulsification process compared to the other two soaps?

2) Victoria's and Liyana's Soap

Victoria's soap did not formed two layers. Therefore, the soap is emulsified properly.

3) Farhan's , Diana's, Linna's and Ai Len's Soaps.

Same goes to Farhan's soaps, The appearance of the soap was completely flawless. No two layers formed

The causes of these different emulsification levels for all the soaps might be due to the different temperature received by parts of the soap when the soap went through a gel phase but the part that was in contact with the mold did not get as hot and gel. It would have a more opaque appearance than the gelled centre. To prevent this, the mold should be pre-warmed before used for a few minutes, this way, the mold will not robbing too much heat from the outside layer of the soap.

Moisturizing Effect

Moisturizing effect was tested for all the soaps. Firstly, the soap was cut into tiny pieces of same size for control as shown below.

And then each soap were tested on skin by washing hand with the soap. Hands were dried after rinsing hands with water.

If the soap has good moisturizing effect, skins of the hand will be soft and not dry.

After testing all the soaps, we found out that none of the soaps has a good moisturizing effect. This might be due to insufficient moisturizing ingredients as we were not allowed to use any other materials that would affect the economical value of the soap. Some ingredients that could be added for increasing the moisturizing effect such as olive oil and palm oil.