The standard "JB/T 9455-1999 Hair Humidity Table, Technical Conditions" defines the technical requirements and performance indicators of the Hair Humidity Table. This standard is applicable to the measurement of hair Humidity instruments to ensure their accurate measurement and Stability in various environments. The standard describes the design, calibrating and testing requirements of the equipment in detail, and provides clear technical guidance for the production, use and maintenance of the equipment to support the scientific research and industrial application of Hair Humidity.