When developing the merchandise, it is very important to evaluate the qualities of products accurately and objectively because it is indispensable for the formulation of a new product and choice of ingredients.
In addition to stability and safety, sensuous valuations, such as usability and agreeableness, are also included in the qualities to be estimated. An outline of estimation technology of usability and agreeableness by machinery and tools for hair care products, such as shampoo, hair rinse, hair treatment etc., will be given here.