Various data of gypsum:

　　选购石膏时，包装上的各种资料可能会使我们不知道在哪里挑选，因此不妨来了解一下有关石膏的各种资料。

　　When choosing gypsum, we may not know where to choose from the various materials on the package, so we might as well learn about the various materials about gypsum.

　　1、细度(细度):顾名思义，细度代表石膏粉的细度，尤其是硬白石膏粉的细度通常在1100目左右，建筑灰泥的细度在300目左右，我们可以看到很多差异。

　　1. Fineness (fineness): As the name implies, fineness represents the fineness of gypsum powder, especially anhydrite powder, which is usually about 1100 meshes, and building mortar which is about 300 meshes. We can see many differences.

　　2. 抗压强度:抗压强度是指外力破碎灰泥的大小。art用白色石材膏体3小时抗压强度为8.1毫帕，施工用石膏3小时抗压强度约为4.9毫帕。

　　2. Compressive strength: Compressive strength refers to the size of crushed mortar by external force. The 3-hour compressive strength of white gypsum for art is 8.1 MPa, and that of construction gypsum is 4.9 MPa.

　　3.抗弯强度:抗弯强度表示单位面积上使材料承受弯矩断裂的力。艺术用石膏的烘烤抗弯强度约为10~12米，施工用石膏的烘烤抗弯强度约为8.4米。

　　3. Flexural strength: Flexural strength represents the force that causes the material to withstand moment fracture per unit area. The baking flexural strength of artistic gypsum is about 10-12 meters, and that of construction gypsum is about 8.4 meters.

　　4. 粘结强度:在面粉和砂子中分别加水搅拌，可能更容易了解粘结强度。面粉会粘在一起，而沙子一碰就会散开。美术灰泥的粘结强度因种类不同(分为粘结类型而常见)因而其强度也会有所不同，建筑灰泥也是如此，因而在购买时好咨询客栈客栈。

　　4. Bond strength: It may be easier to understand the bond strength by mixing flour and sand separately with water. Flour sticks together and sand scatters when touched. The bond strength of art mortar varies according to different types (commonly divided into bond types), so does the strength of building mortar. Therefore, it is best to consult the Inn and inn when purchasing.

　　如何对石膏进行人工加固:

　　How to reinforce gypsum manually:

　　有时，为了达到生产效果，人为地使用一种材料来增加成品的强度。例如:

　　Sometimes, in order to achieve production results, artificial use of a material to increase the strength of finished products. For example:

　　1. 石膏粉与树脂和固化剂混合形成膏体。这样，成品的强度将比普通产品有很大的提高。

　　1. Gypsum powder is mixed with resin and curing agent to form gypsum. In this way, the strength of finished products will be greatly improved than that of ordinary products.

　　2、使用玻璃纤维布、纱布、树脂或各种材料中的一种来加固石膏制品。

　　2. Use fiberglass cloth, gauze, resin or one of various materials to reinforce gypsum products.

　　3.有时乳胶漆也是石膏生产的重要辅助材料。加入乳白色胶水的石膏，成品要比一般石膏更光滑细腻，但上色时，油性料会漂浮在物体表面，而不会被石膏吸收，因而要多加注意!

　　3. Sometimes latex paint is also an important auxiliary material for gypsum production. The finished product of gypsum with milky white glue is smoother and more delicate than ordinary gypsum, but when coloring, the oily material will float on the surface of the object without being absorbed by gypsum, so more attention should be paid to it.