调配比例是石膏粉的使用技巧比较重要的环节：模具石膏粉调配比例为 28(水)：100（石膏粉），这个混合比是混合比，制作出的石膏产品可以达到瓷砖的效果，表面用指甲根本划不出痕迹。但按照这种混合比调配石膏粉，对新手而言难度太大，混合比例的精确掌握、选用的搅拌容器、搅拌手法、凝固时间都不好控制。故一般建议采用35：100的比例调配石膏粉，也可以达到很不错的效果。

　　The mixing proportion is an important part of the use skill of gypsum powder: the mixing proportion of mold gypsum powder is 28 (water): 100 (gypsum powder), which is the highest mixing ratio. The gypsum product can achieve the effect of ceramic tile, and the surface can not be scratched with nails. But according to this mixing ratio, it is too difficult for the novice to prepare gypsum powder. The accurate control of mixing ratio, the selected mixing container, mixing technique and setting time are not easy to control. Therefore, it is generally recommended to use the proportion of 35:100 to mix gypsum powder, which can also achieve very good results.

　　调配石膏粉次序：先加水后加石膏粉，切记这点很重要，先粉后水石膏粉很难搅拌到非常均匀，石膏的硬度与搅拌的均匀程度是成正比的，搅拌越均匀，牢度越高。

　　Mixing order of gypsum powder: add water first and then gypsum powder. It is very important to remember this point. It is difficult to mix gypsum powder first and then gypsum powder. The hardness of gypsum is directly proportional to the uniformity of mixing. The more uniform the mixing, the higher the fastness.

　　凝固时间的掌握：凝固时间主要与加水量有关系（添加剂另外说明），次之与搅拌时间、浇铸容器、温度、湿度有关系。首先水、石膏粉混合比，水越多石膏凝结时间越长，石膏密度越低、牢度越低，水越少凝结时间越短、密度越大、牢度越高，具体需根据使用需求来控制。然后谈下搅拌时间，一般而言搅拌到石膏粉非常均匀即可浇铸，一般控制在5分钟之内，搅拌时间越长，石膏粉凝固时间越快。

　　Control of setting time: the setting time is mainly related to the amount of water added (the additives are also explained), and then to the mixing time, casting container, temperature and humidity. First of all, the mixing ratio of water and gypsum powder, the more water, the longer the setting time of gypsum, the lower the density and the lower the fastness of gypsum, the shorter the setting time of less water, the higher the density and the higher the fastness, which should be controlled according to the use demand. Then talk about the mixing time. Generally speaking, the gypsum powder can be cast when it is stirred to be very uniform. Generally, it is controlled within 5 minutes. The longer the mixing time is, the faster the setting time of gypsum powder is.