Density calculation method for specific gravity cup : p=(m2-me1)/V, m2=total weight of cup and pattern (g), ml=empty cup weight (g), V=cup volume (mm) ratio. Material : The cup body is made of high-quality stainless steel precision machining, which has strong and oxidation resistance. It not only has a bright appearance, but also has textures inside. Appearance: Cylindrical design, large opening cup design, easy to use, integrated molding, no gaps, smooth inner and outer walls, easy to clean. The thickness of the specific gravity cup body is 1.5mm, made of thickened stainless steel material, which is sturdy, not easy to corrode, with a tight lid with a small hole in the middle, no bubbles, high detection accuracy, and equipped with a storage box for easy storage. Instructions : Weigh and record the weight of a clean density cup, adjust the temperature between the density cup and the test solution (20 ℃± 0.5 ℃/68F ± 1.0 ° F), place the sample in the density cup and cover it with a slanted lid to avoid bubbles, use a water absorbing cloth to absorb the spilled liquid, and weigh the density cup filled with liquid.