Test instrument - Softness tester Test slit width should be divided into: 5.0mm, 6.35mm, 10.0mm, 20.0mm four grades, the width of the error should not exceed ± 0.05mm. Plate-like probe Dimensions: Long: 240mm Thickness: 2mm Measuring arc radius: 1mm. Average travel speed and total stroke of the probe: Average travel speed: (1.2 ± 0.24) mm / s Total stroke: 12 ± 0.5mm. Sample press-in depth: Pressing depth: mm Slit parallelism: The parallelism of the slit should not exceed 0.05mm. Probe Neutral: After the probe into the slit probe should be symmetrical symmetry should be less than 0.05mm on both sides. Instrument Accuracy: Maximum instrument range: 1000mN. Load Accuracy: ± 1%. Repeatability: less than 3%. Take the sample: Use GB / T 450 to take the average sample. Sample handling: According to GB / T 10739 temperature mission process...