Cleans the scalp and washes away excess oil

The primary purpose of shampoo is to clean the scalp and wash away any excess oils. It is important to wash thoroughly because when pores on the scalp become clogged, decreased metabolism will result in hair loss. The best hair washing tip is to massage gently making sure not to scratch the scalp.
The main ingredients of shampoo are water and surfactant with roughly 80% water and 10-20% surfactants. Conditioning agents, thickening agents, preservatives, and fragrances constitute about 1%. Surfactants or cleansing agents can be classified into three categories, amino acids, soaps, and high grade alcohol agents and it can further be separated according to its ingredients such as botanical, organic, non-silicone, and scalp. Shampoos are made viscous for ease of handling. Viscosity allows appropriate amount of shampoo in the hand without spilling and it also creates lather. The viscosity of shampoo can also influence the shape of the bottle. Shampoo bottles with pump dispensers will require a larger nozzle diameter for viscous shampoos whereas, shampoo squeezed from cap style shampoo bottles will need hardness of the bottle, amount of force applied to the bottle, and appropriate viscosity to be in balance.

Viscosity of Shampoo

VISCO™  measurement examples
Spindle : A2L
Sample temperature : 30℃

Viscosity of Shampoo

Digital Viscometer VISCO™
How To Measure

Dishsoap & shampoo