Gypsum powder and putty powder are not the same material. Gypsum powder is mainly used for caulking, filling holes and straightening internal and external corners. Its particles are rough, hard after setting, difficult to polish and fast setting speed. Putty powder is mainly used for priming, slow setting speed, soft texture after setting, and easy to polish with sandpaper. It is a better priming material before brushing latex paint.

石膏粉通常为白色、无色，无色透明晶体称为透石膏，有时因含杂质而成灰、浅黄、浅褐等色。条痕白色。透明。玻璃光泽，解理面珍珠光泽，纤维状集合体丝绢光泽。解理极完全，和中等，解理片裂成面夹角为66和114的菱形体。性脆。硬度1.5~2。

Gypsum powder is usually white, colorless, colorless and transparent crystal, which is called transparent gypsum. Sometimes it is gray, light yellow, light brown and other colors due to impurities. The stripes are white. Transparency. Glass luster, cleavage surface pearl luster, fibrous aggregate silk luster. The cleavage is very complete and medium. The cleavage slices are divided into rhomboids with angles of 66 and 114. It's brittle. The hardness is 1.5 ~ 2.

不同方向稍有变化。相对密度2.3。石膏粉是五大凝胶材料之一，在国民经济中占有重要的地位，广泛用于建筑、建材、工业模具和艺术模型、化学工业及农业、食品加工和医药美容等众多应用领域，是一种重要的工业原材料。

Slightly different in different directions. The relative density is 2.3. Gypsum powder is one of the five major gel materials. It plays an important role in the national economy. It is widely used in building, building materials, industrial molds and art models, chemical industry and agriculture, food processing and medical beauty, and so on. It is an important industrial raw material.

腻子粉是建筑装饰材料的一种，主要成分是滑石粉和胶水。 刚刚购置的毛坯房表面的一层白色——腻子，通常腻子的白度在90以上细度在330以上。腻子是用来墙面修补找平的一种基材，为下一步装饰(刷油漆贴壁纸)打下良好的基础。

Putty powder is a kind of building decoration materials, the main components are talcum powder and glue. Just bought a layer of white on the surface of the blank room - putty, usually the whiteness of putty is more than 90, fineness is more than 330. Putty is a kind of base material used to repair and level the wall, which lays a good foundation for the next decoration (painting and wallpaper).

腻子分为内墙和外墙两种，外墙腻子要抵抗风吹日晒所以胶性大、强度高，环保指数稍低。内墙腻子综合指数较好，健康环保，所以内墙不外用，外墙不内用。通常腻子是石膏或者水泥基的，这样表面粗糙比较容易粘接牢固。但是在施工的时候还是要在基层上涂刷一层界面剂来封固基层同时提高墙面的附着力，让腻子能够更好的粘结在基面上。

Putty can be divided into interior wall and exterior wall. Exterior wall putty is resistant to wind and sun, so it has high gel, high strength and low environmental protection index. The composite index of interior wall putty is good, healthy and environmental protection, so the interior wall is not for external use, and the exterior wall is not for internal use. Usually putty is gypsum or cement-based, so the surface is rough and easy to bond firmly. But in the construction, we should brush a layer of interface agent on the base to seal the base, and improve the adhesion of the wall, so that the putty can be better bonded on the base.