The diagram below illustrates the main stages of soap production in the past and present. Summarise the information by selecting and reporting the main features, and make comparisons where relevant

The diagram shows the main phases of soap production in the past and present. Overall, the production in the past has only three simple steps and nowadays they have 5 steps using technical machine. In 1000 years ago, by having animal fat stored and plant ashes added and mixing while the mixture was heated, it’s […]