This standard specifies the structure, technical requirements, test methods, inspection rules, signs and Encasement of the miniature international rubber hardness gauge. It is suitable for the determination of the international rubber Hardness value of vulcanized rubber and small volume curved rubber materials. The hardness gauge consists of a pressure rod, a support device, a contact force application device, a measurement device, a pressure foot, a vibration device and a thermostatic box, etc. The pressure rod can be moved vertically. The lower end is a steel ball or spherical surface. The support device makes the pressure rod slightly higher than the pressure foot reference plane. The force includes the weight of the pressure rod and Accessories and the spring force that may act on the pressure rod. The measurement device directly reads the Rubber International Hardness IRHD and can be mechanical, Optical inspection or electrical.