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.