Chapter 2.Related documents.2.1 soap is used to clean the body, such as bathing, washing soap will help dissolve fat, washed clean up.The soap is.Soap (soap) is caused by the chemicals the reaction between sodium hydroxide (lye, caustic soda, (NaOH,) และน้ำมัน come from animals or plants.A mixture between acid (fat) with a base (alkaline). In the ratio that can be cleaned well and does not harm the skin was pH was between 8-10.Used to cleanse the body along with bath Made from animal fat, mixed with perfume, caustic soda and other raw materialsSoap is a mixture of acid (fat) with a base (alkaline). In the ratio that can be cleaned well and does not harm the skin was pH was between 8-10 (in a document taking notice. The food and drug administration to manufacture soap indicate that the value pH not exceeding 11) acid or fatty acids, such as vegetable oil, animal fat, bass, such as caustic soda by general mixture is suitable when mixed together, should be left the fatty acid is about 5% without measurement values. PH keep soap for at least 15-30 days to the pH decreased. At reasonable rates.The importance of soap.Soap is a necessary items in daily life. Every day we take a bath to use soap to remove dirt from the body. Which most people choose the soap to clean up very well. So regardless of the effects to happen with the skin at a later date. At present, there are many different kinds of soap, we choose to use. The appropriate and individual preferences. But we know just how good those soap And there will be a few attention to detail that soap each block contains important? A good soap to contains important necessary and useful to the skin. In addition to the soap to clean the skin as well. Can the skin. The soap is what we need to use every day. If we select a good soap quality. Will make us healthy skin of good stay with us forever long.The history of soap, soap and soap made from chemical used today.The discovery of soap.
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