What does soap quality depend on? The total alkali and oil contents of the soap are the properties that indicate soap quality. These chemical properties include moisture content, total fatty acids (TFM), pH, and the percentage of free alkali and chloride.

What are the components of compressed coal? Compressed coal is formed by compressing natural coal with binders such as sawdust or coal powder, resulting in solid, high-density coal pieces. This is achieved under medium pressures ranging from 700 to 1300 kilopascals and temperatures ranging from 700 to 1200 degrees Celsius.

What is the lifespan of plastic? Under normal conditions, plastic bottles (most of which are made of polyethylene terephthalate, called PET, short for Polyethylene terephthalate) begin to decompose after 500-700 years, and the decomposition is very slow at that time. Plastic bags begin to decompose after 1000 years.