Various data of gypsum:

　　選購石膏時，包裝上的各種資料可能會使我們不知道在哪里挑選，因此不妨來了解一下有關石膏的各種資料。

　　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、細度(細度):顧名思義，細度代表石膏粉的細度，尤其是硬白石膏粉的細度通常在1100目左右，建筑灰泥的細度在300目左右，我們可以看到很多差異。

　　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. 抗壓強度:抗壓強度是指外力破碎灰泥的大小。art用白色石材膏體3小時抗壓強度為8.1毫帕，施工用石膏3小時抗壓強度約為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.抗彎強度:抗彎強度表示單位面積上使材料承受彎矩斷裂的力。藝術用石膏的烘烤抗彎強度約為10~12米，施工用石膏的烘烤抗彎強度約為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. 粘結強度:在面粉和砂子中分別加水攪拌，可能更容易了解粘結強度。面粉會粘在一起，而沙子一碰就會散開。美術灰泥的粘結強度因種類不同(分為粘結類型而常見)因而其強度也會有所不同，建筑灰泥也是如此，因而在購買時好咨詢客棧客棧。

　　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.

　　如何對石膏進行人工加固:

　　How to reinforce gypsum manually:

　　有時，為了達到生產效果，人為地使用一種材料來增加成品的強度。例如:

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

　　1. 石膏粉與樹脂和固化劑混合形成膏體。這樣，成品的強度將比普通產品有很大的提高。

　　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、使用玻璃纖維布、紗布、樹脂或各種材料中的一種來加固石膏制品。

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

　　3.有時乳膠漆也是石膏生產的重要輔助材料。加入乳白色膠水的石膏，成品要比一般石膏更光滑細膩，但上色時，油性料會漂浮在物體表面，而不會被石膏吸收，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.