This standard covers a method of preparing, maintaining, and using a temperature reference bath of a mixture of shaved ice and water, saturated with air at a pressure of 101 325 Pa (1atm). 1.2 An industrial practice for relating values referenced to the ice point and to the water triple point on the ITS-90 is included. 1.3 Methods to promote uniformity of bath temperature by mechanical stirring or agitation are not described in detail. 1.4 Methods of approximating the ice point, as by thermostatically-controlled refrigeration, are not covered by this standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.