There are many additives in Jinan gypsum powder. Let's take a look at these commonly used ones:

　　1、乳白膠：這是一種比較常用的添加劑，主要作用增加石膏的牢固度，乳白膠的添加會使石膏粉凝固時間延長，乳白膠用的越多凝固時間越長，這里提示下，添加乳白膠（較多）凝固后石膏表面比較細膩的感覺，上色不容易被石膏吸收，顏料只會停在石膏表面。制作粗糙表面、需要石膏自然吸收顏料的時候要注意，是否添加乳白膠是會影響更終效果。

　　1. Milky white glue: it is a kind of common additive, which is mainly used to increase the firmness of gypsum. The addition of milky white glue will prolong the setting time of gypsum powder. The more milky white glue is used, the longer the setting time is. Here, it is suggested that the surface of gypsum is more delicate after the solidification of milky white glue (more) is added. The coloring is not easy to be absorbed by gypsum, and the pigment will only stop on the surface of gypsum. When making rough surface and needing gypsum to absorb pigment naturally, we should pay attention to whether adding opalescent glue will affect the final effect.

　　2、消泡劑：主要用于消除石膏粉攪拌產生的氣泡，效果比較好，但會增加石膏粉凝固時間，且價格非常貴，并不適合普通制作使用。

　　2. Defoamer: it is mainly used to eliminate the bubbles produced by the mixing of gypsum powder. The effect is good, but it will increase the setting time of gypsum powder, and the price is very expensive. It is not suitable for ordinary production.

　　3、石膏加固材料：在石膏鑄型凝固前在其內部增加龍骨材料可以大幅提升石膏牢度，常用材料有：玻璃纖維、竹簽、紙漿、ABS管材、高密度泡沫等，具體根據使用需要來選材。

　　3, gypsum reinforcement materials: gypsum mold solidification before its internal increase in keel material can greatly enhance the fastness of gypsum, commonly used materials are: glass fiber, bamboo sticks, pulp, ABS pipes, high-density foam, etc., according to the specific needs of material selection.

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