The setting time of Jinan gypsum powder generally depends on the grade of gypsum powder, and the high mark generally coagulates quickly. The reaction speed of gypsum powder and water is very fast, and the general operation time is only a few minutes. In the first minute, the gypsum powder is sprinkled into the water, the second minute is stirred, and the third minute is inverted. It will harden quickly.

建筑石膏粉：在装修粉刷过程中，需要延长石膏粉的凝固时间。不过让石膏凝固速度降慢的方法是在把石膏粉加水的时候使用温度较低的凉水 水越凉凝固速度就越慢，反之用热水就会很快。如果觉得这个办法不行，还可以加入柠檬酸或者先在石膏粉里掺好腻子粉，在水里掺上108胶白乳胶和纤维素，再调和。

Building gypsum powder: in the process of decoration and painting, it is necessary to extend the setting time of gypsum powder. However, the way to slow down the setting speed of gypsum is to use cool water with lower temperature when adding water to gypsum powder. The cooler the water is, the slower the setting speed will be; otherwise, it will be very fast with hot water. If you don't think this method can't work, you can also add citric acid or first mix putty powder in gypsum powder, add 108 glue white latex and cellulose in water, and then mix.

模具石膏粉：如果硬化速度过快，可以往水中加一些缓凝剂，如：乙醇（酒精）约占6-8%，可以延长操作时间。一般的模型，使用建筑石膏粉或高强度石膏粉。如果铸模用，那需要专门的石膏铸粉。另外需要注意石膏粉与水的比例，水的多少直接影响石膏模的质量。

Mold gypsum powder: if the hardening speed is too fast, you can add some retarders to the water, such as: ethanol (alcohol) accounts for about 6-8%, which can extend the operation time. General model, using construction gypsum powder or high strength gypsum powder. If the mold is used, it needs special gypsum powder. In addition, it is necessary to pay attention to the proportion of gypsum powder and water, and the amount of water directly affects the quality of gypsum mold.