Second Box: (Draw a bar soap washing a person's body.
Description: In 2800 B.C, a soap that has fat, that is boiled with ashes, were used to wash people's body.
Third Box: (Draw a soap that is washing a person's body and cleaning their wound.)
Description: By the second century, a Greek physician, Galen, recommended soap for medical and cleansing purposes.
Fourth Box: (Draw a bar soap and fat with salt.)
Description: In 1791, Nicholas Leblanc patented making soda ash.
Fifth Box: (Draw a soap with common table salt.)
Description: In the mid-1800s, Ernest Solvay invented another soap technology, the ammonia process, to make soda ash out of table salt. This method reduces the cost of obtaining soda ash and increased its quantity and quality for soap manufacturing.
Assessment 1
- To maintain good hygiene.
- Fat, oils, and salt.
- Soda ash is a by-product in soap making created when lye comes into contact with carbon dioxide
- The first synthetic detergents for general use, however, were produced by the Germans in the World War I period so that available fats could be utilized for other purposes.
