The aggregates of heavy gypsum and light gypsum are different, with heavy gypsum aggregates being sand and light gypsum being vitrified microspheres. Vitrified microspheres as lightweight filling aggregates have advantages such as insulation, fire resistance, and sound absorption. In the building materials industry, using vitrified microspheres as lightweight aggregates can improve the flowability and self resistance of mortar, reduce material shrinkage, improve product comprehensive performance, and reduce comprehensive production costs. At the same time, compared to sand, vitrified microspheres can also form certain particle strength due to surface vitrification, and have strong aging and weather resistance, as well as excellent insulation, fire prevention, and sound absorption properties. The gypsum content is different. Light plaster gypsum requires a gypsum powder content of ≥ 75%, while heavy plaster gypsum requires a gypsum powder content of ≥ 35%. Different technical performance: 1. Different density; The density of lightweight plastering gypsum is ≤ 1000kg/m3, and the density of heavy plastering gypsum is>1000kg/m3.

2、保水率（%）；輕質抹灰石膏保水率≥ 60%，重質抹灰石膏保水率≥ 75%。

2. Water retention rate (%); The water retention rate of lightweight plastering gypsum is ≥ 60%, and that of heavy plastering gypsum is ≥ 75%.

3、拉伸粘結強度；輕質抹灰石膏拉伸粘結強度≥0.3Mpa，重質抹灰石膏拉伸粘結強度≥0.4Mpa。

3. Tensile bonding strength; The tensile bonding strength of lightweight plastering gypsum is ≥ 0.3Mpa, and the tensile bonding strength of heavy plastering gypsum is ≥ 0.4Mpa.

4、抗壓強度；輕質抹灰石膏抗壓強度≥1.5Mpa，重質抹灰石膏抗壓強度≥4.0Mpa。

4. Compressive strength; The compressive strength of lightweight plastering gypsum is ≥ 1.5Mpa, and the compressive strength of heavy plastering gypsum is ≥ 4.0Mpa.

5、抗折強度；輕質抹灰石膏抗折強度≥1.0Mpa，重質抹灰石膏抗折強度≥2.0Mpa。輕質抹灰石膏，具有容重小，施工便捷，好運輸，遇水不化，成本低，保溫性能優良，強度適中，能夠機械噴涂等種種特點，是淘汰重質粉刷石膏后的又一升級換代產品。給開發商和施工單位帶來了福音，給住戶帶來了更加舒適的環境。輕質抹灰石膏與市場上相比，每噸可出面積130㎡/公分，是重質粉刷石膏的3倍，大大提高了施工的效率和運輸成本。

5. Bending strength; The flexural strength of lightweight plastering gypsum is ≥ 1.0Mpa, and the flexural strength of heavy plastering gypsum is ≥ 2.0Mpa. Lightweight plastering gypsum has various characteristics such as small bulk density, convenient construction, easy transportation, low cost, excellent insulation performance, moderate strength, and mechanical spraying. It is another upgraded product after the elimination of heavy plastering gypsum. Bringing good news to developers and construction units, and bringing a more comfortable environment to residents. Compared with the market, lightweight plastering gypsum can produce an area of 130 square meters per ton, which is three times that of heavy plastering gypsum, greatly improving construction efficiency and transportation costs.