■ Measurement method of density using a glimpsed pycnometer type I type (Refer to JIS K2249) 1) The mass (M0) of the picknometer is applied to the 0.1m digit. 2) With the picknometer standing up, the sample set to 15 ° C is filled with the appropriate scale of the fine tube from one end of the hook to the appropriate scale of the fine tube. 3) Soak the picknometer with a sample in a constant temperature tank at 15 ± 0.05 ° C. 4) When the scale is constant, read the liquid surface of the two -bodies until 1/2 of the small scale, and record the total. 5) Take out the picknometer from the constant temperature aquarium, rinse the outside, wipe it with a purifier, dries it, and apply the mass (M ₁₅ ) to 0.1m. 6) Calibric line diagram * (1) In search of the water mass (M ₁₅ ) corresponding to the total value of the scan of a picknometer, this is the mass of the volume of the volume of the volume at 15 ° C. Calculate the density of the sample from the following equation. d ₁₅ = {(m ₁₅ -m ₀ ) × D ¹⁵ W/m ₁₅ }+CD ₁₅ ▽ M ₁₅ : Mass bottle, bottle and cap mass (g) m ₀ : Mass (G) D ¹⁵ W: Water density (15 ° C) 0.99910g/cm ³ ) m ₁₅ : Mass of water obtained from the calibration line map (g) C: Correction value for buoyancy of air (G/CM ³ ) (JIS K2249 Table See 20) * (1): The calibration diagram is created when proofreading a picknometer. See JIS K2249 7.5 for details.