The geography of shampoo: How is Shampoo physically made?

First of all, a large batch of shampoo is made and then the batch is filled into the plastic bottles, which were made in another factory. The manufactoring proccess of shampoo can br broken down into three steps:

Compounding:

Compounding is the proccess of any large scale cosmetic production. All the indredients of Shampoo are mixed together in large steel tanks (about 3000 gallons) by workers. These workers are known as compounders. The raw materials, are poured into the batch tanks and thoroughly mixed. The order and temperatures are determined by a formulating chemist. Some ingredients like water or detergents are pumped and metered into the batch tanks. A computer system is often used to control mixing speed and temperature. Depending on the size and type of shampoo, making a 3000 gallon batch can take any where from 1 to 4 hours.

Quality control check: After the shampoo has been approved by the Quality Control department, it is pumped into a holding tank, and will be stored untill the bottles are ready to be filled. From the holding tank, it gets pumped into a filler, which will then fill the shampoo bottles with the shampoo.

Filling: The filling line is a long conveyor belt. At the start of the filling line, empty bottles are put into a hopper. The bottles are placed upright by a machine. They move along the conveyor belt to the filling carousel which holds the shampoo.
The filling carousel is made up of a series of filling heads that are designed to deliver the correct amount of shampoo into the bottles. As the bottles move through this section of the filling line, they are automatically filled with shampoo. Next the bottles are capped, which can be done by machine or by a worker, depending on the factory. The labels are then put on, and put in boxes ready for shipping.

Shampoo - Sofia, Sofia City